Acceptance and Commitment Therapy

Target Population

ACT is designed to serve a wide range of population groups and has been used to treat a variety of presenting problems. ACT does not require specific diagnostic criteria.

Dosage

ACT has no set dosage or recommended number of sessions. ACT treatment should be responsive to individuals’ presenting needs and progress in treatment.

Location/Delivery Setting

Recommended Locations/Delivery Settings

ACT can be delivered in a variety of settings, including but not limited to therapists’ offices, teleconference or telephone, or community settings.

Location/Delivery Settings Observed in the Research

• Mental Health Center, Treatment Center, Therapist Office
• Online
• Hospital/Medical Center

Education, Certifications and Training

ACT therapists may receive training through peer recognized trainers who are certified by the Association for Contextual Behavioral Sciences.  

Program or Service Documentation

Book/Manual/Available documentation used for review

Hayes, S. C., Strosahl, K. D., & Wilson, K. G. (2012). Acceptance and commitment therapy second edition: The process and practice of mindful change (2nd ed.). Guilford Press.

Available languages

The ACT manual has been translated into Chinese, Danish, Dutch, German, Hebrew, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish, Turkish, and Ukrainian.  

Other supporting materials

ACT Overview 

ACT FAQ

 ACT Training and Resources

For More Information

Website: https://contextualscience.org/  

Email: acbsstaff@contextualscience.org 

Note: The details on Dosage; Location; Education, Certifications, and Training; Other Supporting Materials; and For More Information sections above are provided to website users for informational purposes only. This information is not exhaustive and may be subject to change.

Results of Search and Review	Number of Studies Identified and Reviewed for Acceptance and Commitment Therapy
Identified in Search	249
Eligible for Review	201
Rated High	6
Rated Moderate	1
Rated Low	8
Reviewed Only for Risk of Harm	186

Outcome	Effect Size	95% Confidence Interval	Implied Percentile Effect	N of Studies (Findings)	N of Participants	Summary of Findings
Adult well-being: Parent/caregiver mental or emotional health	0.19	[0.06, 0.32]	7	6 (55)	986	Favorable: 12 No Effect: 38 Unfavorable: 5
Adult well-being: Parent/caregiver physical health	0.24	[0.03, 0.45]	9	4 (30)	380	Favorable: 12 No Effect: 18 Unfavorable: 0
Composite Outcomes				2 (8)	300	Favorable: 2 No Effect: 6 Unfavorable: 0

Note: For the effect sizes and implied percentile effects reported in the table, a positive number favors the intervention condition and a negative number favors the comparison condition. A range of comparison conditions, including no intervention, minimal intervention, placebo or attention, treatment as usual, and head-to-head comparison conditions are eligible for review (see Section 4.1.7 of the Handbook Version 2.0). Different types of comparison conditions may affect the magnitude of the effect sizes across studies. For example, an intervention compared to a no treatment comparison condition may produce a larger effect size than the same intervention compared to another intervention because the other intervention may itself be effective. The effect sizes shown may be derived from samples that overlap across studies. Effect sizes, confidence intervals, and implied percentile effects from any outcomes that assess outcomes across multiple domains (i.e., composite outcomes) are not shown in the Summary of Findings table. This is because combining different outcomes that represent several different domains may result in an average effect size that is not interpretable as a finding from any specific domain. See the Individual Study Findings table for the individual findings from any composite outcomes. For informational purposes, the number of studies, findings, and participants as well as counts of favorable, no effect, and unfavorable findings are displayed here for composite outcomes.

See the Individual Study Findings table for information about the specific comparison conditions used in each study and the Studies Reviewed section for information about any overlapping samples. The effect sizes presented here are provided for informational purposes only and are not used in determining a program or service rating.

Effect sizes for some outcomes were not able to be calculated by the Prevention Services Clearinghouse.

The findings reported for this program or service are derived from eligible, prioritized studies rated as moderate or high on study design and execution and do not represent the findings from all eligible studies of the program or service. Learn more on the FAQ page.

Outcome	Effect Size	Implied Percentile Effect	Months after treatment when outcome measured	Number of Participants
Adult well-being: Parent/caregiver mental or emotional health
Study 12960 - ACT vs. Treatment As Usual (Finnes, 2019 - Not conducted in a usual care or practice setting)
Karolinska Exhaustion Disorder Scale (KEDS)	0.38 *	14	0	135
Karolinska Exhaustion Disorder Scale (KEDS)	0.09	3	3	146
Karolinska Exhaustion Disorder Scale (KEDS)	0.11	4	9	157
Hospital Anxiety and Depression Scale (HADS): Anxiety	0.36 *	13	0	135
Hospital Anxiety and Depression Scale (HADS): Anxiety	0.05	1	3	149
Hospital Anxiety and Depression Scale (HADS): Anxiety	0.15	5	9	159
Hospital Anxiety and Depression Scale (HADS): Depression	0.43 *	16	0	135
Hospital Anxiety and Depression Scale (HADS): Depression	0.26	10	3	149
Hospital Anxiety and Depression Scale (HADS): Depression	0.06	2	9	159
Study 12669 - Extended ACT vs. Enhanced Care (Frølund Pedersen, 2019)
MOS 36-Item Short Form Health Survey – Version 1: Mental Health (Danish)	0.04	1	3	108
92-Item Hopkins Symptom Checklist – Revised Version: Anxiety (Danish)	-0.11	-4	3	107
92-Item Hopkins Symptom Checklist – Revised Version: Depression (Danish)	0.09	3	3	107
Whiteley-7 Scale: Illness Worry (Danish)	-0.07	-2	3	107
MOS 36-Item Short Form Health Survey – Version 1: Mental Health (Danish)	0.01	0	11	99
92-Item Hopkins Symptom Checklist – Revised Version: Anxiety (Danish)	-0.04	-1	11	99
92-Item Hopkins Symptom Checklist – Revised Version: Depression (Danish)	0.20 *	7	11	99
Whiteley-7 Scale: Illness Worry (Danish)	0.00	0	11	99
MOS 36-Item Short Form Health Survey – Version 1: Mental Health (Danish)	0.14	5	17	94
92-Item Hopkins Symptom Checklist – Revised Version: Anxiety (Danish)	0.18	7	17	92
92-Item Hopkins Symptom Checklist – Revised Version: Depression (Danish)	0.13	5	17	92
Whiteley-7 Scale: Illness Worry (Danish)	0.10	4	17	92
Study 12669 - Brief ACT vs. Enhanced Care (Frølund Pedersen, 2019)
92-Item Hopkins Symptom Checklist – Revised Version: Anxiety (Danish)	-0.27 *	-10	5	111
92-Item Hopkins Symptom Checklist – Revised Version: Depression (Danish)	-0.17	-6	5	111
Whiteley-7 Scale: Illness Worry (Danish)	-0.03	-1	5	111
92-Item Hopkins Symptom Checklist – Revised Version: Anxiety (Danish)	-0.31 *	-12	13	104
92-Item Hopkins Symptom Checklist – Revised Version: Depression (Danish)	-0.30 *	-11	13	104
Whiteley-7 Scale: Illness Worry (Danish)	-0.08	-3	13	104
92-Item Hopkins Symptom Checklist – Revised Version: Anxiety (Danish)	-0.15	-5	19	100
92-Item Hopkins Symptom Checklist – Revised Version: Depression (Danish)	-0.42 *	-16	19	100
Whiteley-7 Scale: Illness Worry (Danish)	-0.21 *	-8	19	100
Study 12487 - ACT vs. Present-Centered Therapy (Lang, 2017)
Patient Health Questionnaire – 9: Depression (Mid-Treatment)	-0.12	-4	0	116
PTSD Checklist – Military Version (Mid-Treatment)	0.25	9	0	117
Dimensions of Anger Reactions – 5 (Mid-Treatment)	0.18	7	0	115
Insomnia Severity Index	0.37 *	14	0	95
World Health Organization Quality of Life – Brief Version: Psychological Well-Being (Mid-Treatment)	0.07	2	0	112
Study 12701 - ACT in Daily Life vs. TAU without CBT for Psychosis (Myin-Germeys, 2022)
Comprehensive Assessment Scale of At Risk Mental State	0.04	1	0	121
Study 12701 - ACT in Daily Life vs. TAU with or without CBT for Psychosis (Myin-Germeys, 2022)
Brief Psychiatric Rating Scale: Total	0.70 *	25	6	148
Brief Psychiatric Rating Scale: Affective	0.53 *	20	6	148
Brief Psychiatric Rating Scale: Positive	0.05	2	6	148
Brief Psychiatric Rating Scale: Negative	0.62 *	23	6	148
Study 12701 - ACT in Daily Life vs. TAU with CBT for Psychosis (Myin-Germeys, 2022)
Comprehensive Assessment Scale of At Risk Mental State	0.35	13	12	98
Study 13104 - ACT vs. Treatment as Usual (Parling, 2016)
Eating Disorder Examination Questionnaire: Global Score	-0.30	-11	60	43
Eating Disorder Examination Questionnaire: Restraint	-0.19	-7	60	43
Eating Disorder Examination Questionnaire: Eating Concern	-0.26	-10	60	38
Eating Disorder Examination Questionnaire: Shape Concern	-0.19	-7	60	43
Eating Disorder Examination Questionnaire: Weight Concern	-0.14	-5	60	43
Clinical Impairment Assessment	0.15	5	60	31
Study 13510 - ACT vs. Tinnitus Retraining Therapy (Westin, 2011)
Hospital Anxiety and Depression Scale: Anxiety (Swedish)	0.91 *	31	0	39
Hospital Anxiety and Depression Scale: Depression (Swedish)	0.70 *	25	0	39
Quality of Life Inventory (Swedish)	0.19	7	0	39
Tinnitus Acceptance Questionnaire (Swedish)	0.87 *	30	0	39
Study 13510 - ACT vs. Waitlist Control (Westin, 2011)
Hospital Anxiety and Depression Scale: Anxiety (Swedish)	0.80 *	28	0	42
Hospital Anxiety and Depression Scale: Depression (Swedish)	0.67	24	0	42
Quality of Life Inventory (Swedish)	0.51	19	0	42
Tinnitus Acceptance Questionnaire (Swedish)	0.83	29	0	42
Adult well-being: Parent/caregiver physical health
Study 12669 - Extended ACT vs. Enhanced Care (Frølund Pedersen, 2019)
MOS 36-Item Short Form Health Survey – Version 1: Physical Functioning (Danish)	0.07	2	3	108
MOS 36-Item Short Form Health Survey – Version 1: Physical Health (Danish)	0.09	3	3	108
92-Item Hopkins Symptom Checklist – Revised Version: Somatic Symptoms (Danish)	-0.04	-1	3	107
Bodily Distress Syndrome Checklist (Danish)	0.01	0	3	107
MOS 36-Item Short Form Health Survey – Version 1: Physical Functioning (Danish)	0.26 *	10	11	99
MOS 36-Item Short Form Health Survey – Version 1: Physical Health (Danish)	0.30 *	11	11	99
92-Item Hopkins Symptom Checklist – Revised Version: Somatic Symptoms (Danish)	0.24 *	9	11	99
Bodily Distress Syndrome Checklist (Danish)	0.09	3	11	99
MOS 36-Item Short Form Health Survey – Version 1: Physical Functioning (Danish)	0.35 *	13	17	94
MOS 36-Item Short Form Health Survey – Version 1: Physical Health (Danish)	0.29 *	11	17	94
92-Item Hopkins Symptom Checklist – Revised Version: Somatic Symptoms (Danish)	0.19	7	17	92
Bodily Distress Syndrome Checklist (Danish)	0.24 *	9	17	92
Clinical Global Improvement Scale – 5: Overall Health Improvement (Self-Report)	0.64 *	23	11	99
Study 12669 - Brief ACT vs. Enhanced Care (Frølund Pedersen, 2019)
MOS 36-Item Short Form Health Survey – Version 1: Physical Functioning (Danish)	0.22 *	8	5	113
MOS 36-Item Short Form Health Survey – Version 1: Physical Health (Danish)	0.15	5	5	113
92-Item Hopkins Symptom Checklist – Revised Version: Somatic Symptoms (Danish)	-0.07	-2	5	112
Bodily Distress Syndrome Checklist (Danish)	0.04	1	5	113
MOS 36-Item Short Form Health Survey – Version 1: Physical Functioning (Danish)	0.20 *	7	13	104
MOS 36-Item Short Form Health Survey – Version 1: Physical Health (Danish)	0.10	3	13	104
92-Item Hopkins Symptom Checklist – Revised Version: Somatic Symptoms (Danish)	-0.01	0	13	104
Bodily Distress Syndrome Checklist (Danish)	-0.01	0	13	104
MOS 36-Item Short Form Health Survey – Version 1: Physical Functioning (Danish)	0.18	7	19	100
MOS 36-Item Short Form Health Survey – Version 1: Physical Health (Danish)	0.09	3	19	100
Bodily Distress Syndrome Checklist (Danish)	0.02	0	19	100
92-Item Hopkins Symptom Checklist – Revised Version: Somatic Symptoms (Danish)	-0.08	-3	19	100
Clinical Global Improvement Scale - 5: Overall Health Improvement (Self-Report)	Null	not calculated	13	104
Study 13435 - Acceptance and Commitment Therapy Plus Treatment As Usual vs. Treatment As Usual (Grazzi, 2021)
Daily Headache Diary: Headache Frequency – Italian	0.97 *	33	3	35
Study 13104 - ACT vs. Treatment as Usual (Parling, 2016)
Body Mass Index	-0.16	-6	60	43
Study 13510 - ACT vs. Tinnitus Retraining Therapy (Westin, 2011)
Insomnia Severity Index (Swedish)	0.69 *	25	0	39
Study 13510 - ACT vs. Waitlist Control (Westin, 2011)
Insomnia Severity Index (Swedish)	0.22 *	8	0	42
Composite Outcomes
Study 12669 - Extended ACT vs. Enhanced Care (Frølund Pedersen, 2019)
World Health Organization Disability Assessment Schedule 2.0	0.13	5	3	106
World Health Organization Disability Assessment Schedule 2.0	0.16	6	11	98
World Health Organization Disability Assessment Schedule 2.0	0.19	7	17	93
Study 12669 - Brief ACT vs. Enhanced Care (Frølund Pedersen, 2019)
World Health Organization Disability Assessment Schedule 2.0	0.09	3	5	113
World Health Organization Disability Assessment Schedule 2.0	-0.12	-4	13	104
World Health Organization Disability Assessment Schedule 2.0	-0.11	-4	19	100
Study 13510 - ACT vs. Tinnitus Retraining Therapy (Westin, 2011)
Tinnitus Handicap Inventory (Swedish)	0.78 *	28	0	39
Study 13510 - ACT vs. Waitlist Control (Westin, 2011)
Tinnitus Handicap Inventory (Swedish)	1.04 *	35	0	42

*p <.05

Note: For the effect sizes and implied percentile effects reported in the table, a positive number favors the intervention condition and a negative number favors the comparison condition. Effect sizes and implied percentile effects were calculated by the Prevention Services Clearinghouse as described in the Handbook of Standards and Procedures, Version 2.0, Sections 6.4 and 6.5 and may not align with effect sizes reported in individual publications. The Prevention Services Clearinghouse uses information reported in study documents and, when necessary, information provided by study authors in response to author queries to assign study ratings and calculate effect sizes (see Section 8.4.2 in the Handbook of Standards and Procedures, Version 2.0). The Prevention Services Clearinghouse typically relies on study-reported p-values to form the basis of the assessment of statistical significance for a finding, but will perform its own statistical test of a finding using any available information in study documents or author queries, as needed (see Section 6.3 in the Handbook of Standards and Procedures, Version 2.0). As a result, the effect sizes and statistical significance reported in the table may not align with the estimates as they are reported in study documents. Effect sizes for some outcomes were not able to be calculated by the Prevention Services Clearinghouse.

The findings reported for this program or service are derived from eligible, prioritized studies rated as moderate or high on study design and execution and do not represent the findings from all eligible studies of the program or service. Learn more on the FAQ page.

Only publications with eligible contrasts that met design and execution standards are included in the individual study findings table.

Full citations for the studies shown in the table are available in the "Studies Reviewed" section.

The participant characteristics display is an initial version. We encourage those interested in providing feedback to send suggestions to preventionservices@abtglobal.com.

The table below displays locations, the year, and participant demographics for studies that received moderate or high ratings on design and execution and that reported the information. Participant characteristics for studies with more than one intervention versus comparison group pair that received moderate or high ratings are shown separately in the table. Please note, the information presented here uses terminology directly from the study documents, when available. Studies that received moderate or high ratings on design and execution that did not include relevant participant demographic information would not be represented in this table.

For more information on how Clearinghouse reviewers record the information in the table, please see our Resource Guide on Study Participant Characteristics and Settings.

Characteristics of the Participants in the Studies with Moderate or High Ratings
Study Location	Study Year	Demographic Characteristics	Populations of Interest*	Household Socioeconomic Status
Study 12960 - ACT vs. Treatment As Usual
Characteristics of the Adults, Parents, or Caregivers
Stockholm, Sweden	2013	Average age 46.0 years; Age range 22-61 years 19% Born outside Sweden 81% Females	100% diagnosed disability; diagnosed comorbidities: 69.7% exhaustion disorder, 66.3% depression current, 28.1% generalized anxiety disorder, 16.9% panic disorder, 12.4% social phobia; 66% have children	100% Employed
Study 12701 - ACT in Daily Life vs. TAU without CBT for Psychosis
Characteristics of the Adults, Parents, or Caregivers
Netherlands, Belgium	2016	Average age: 25 years; Age range: 15-47 years 38% Ethnic minority 49% Female	--	42% Unemployed (non-structured)
Study 12701 - ACT in Daily Life vs. TAU with or without CBT for Psychosis
Characteristics of the Adults, Parents, or Caregivers
Netherlands, Belgium	2016	Average age: 25 years; Age range: 15-47 years 38% Ethnic minority 49% Female	--	42% Unemployed (non-structured)
Study 12701 - ACT in Daily Life vs. TAU with CBT for Psychosis
Characteristics of the Adults, Parents, or Caregivers
Netherlands, Belgium	2016	Average age: 25 years; Age range: 15-47 years 38% Ethnic minority 49% Female	--	42% Unemployed (non-structured)
Study 13104 - ACT vs. Treatment as Usual
Characteristics of the Adults, Parents, or Caregivers
Sweden	2005	Average age: 26 years; Age range: 18-51 years 98% Female 2.3% Male	84% with diagnosis of eating disorder not otherwise specified, 16% with diagnosis of anorexia nervosa	31% Working 26% On sick leave 10% Unemployed
Study 12669 - Extended ACT vs. Enhanced Care
Characteristics of the Adults, Parents, or Caregivers
Denmark	2012	Average age: 39 years 79% Female	100% had a functional somatic syndrome, 74% chronic fatigue syndrome, 71% fibromyalgia, 63% tension headache, 50% non-cardiac chest pain, 33% irritable bowel syndrome	38% Employed or student 34% Unemployed 28% Disability pension or flexible work 21% On sick leave
Study 12669 - Brief ACT vs. Enhanced Care
Characteristics of the Adults, Parents, or Caregivers
Denmark	2012	Average age: 39 years 83% Female	100% Had a functional somatic syndrome: 79% Chronic fatigue syndrome, 74% Fibromyalgia, 74% Tension headache, 55% Non-cardiac chest pain, 29% Irritable bowel syndrome	40% Employed or student 31% Unemployed 29% Disability pension or flexible work 23% On sick leave
Study 13510 - ACT vs. Tinnitus Retraining Therapy
Characteristics of the Adults, Parents, or Caregivers
Sweden	--	Average age: 51 years 55% Woman	Average Tinnitus duration: 8 years	65% Full/part time work/study 20% Unemployment/sick leave 15% Retired
Study 13510 - ACT vs. Waitlist Control
Characteristics of the Adults, Parents, or Caregivers
Sweden	--	Average age: 51 years 52% Woman	Average Tinnitus duration: 7 years	57% Full/part time work/study 26% Unemployment/sick leave 16% Retired
Study 12487 - ACT vs. Present-Centered Therapy
Characteristics of the Adults, Parents, or Caregivers
Cincinnati, OH, USA; Durham, NC, USA; Puget Sound, VA, USA; San Diego, CA, USA; Togus, ME, USA	--	Average age: 34.2 years 84% Not Hispanic or Latino/a 75% White 13% Hispanic or Latino/a 11% Black 10% Mixed race or unknown 4% Asian 3% Other 80% Male	MINI-based diagnoses: 82% PTSD, 54% major depression, 43% agoraphobia, 26% panic disorder, 18% general anxiety disorder, 14% social anxiety disorder, 12% obsessive compulsive disorder, 6% depression not otherwise specified, 3% anxiety not otherwise specified	27% $50,000 or more annual income 34% $25,000-49,999 annual income 26% $10,000-24,999 annual income 13% Less than $10,000 annual income 43% Full or part time employment 31% Not working/unspecified 27% Unemployed
Study 13435 - Acceptance and Commitment Therapy Plus Treatment As Usual vs. Treatment As Usual
Characteristics of the Adults, Parents, or Caregivers
Milan, Italy	2018	Average age: 43 years; Age range: 18-65 years	--	--

“--” indicates information not reported in the study.

* The information about disabilities is based on initial coding. For more information on how the Clearinghouse recorded disability information for the initial release, please see our Resource Guide on Study Participant Characteristics and Settings.

Note: Citations for the documents associated with each 5-digit study number shown in the table can be found in the “Studies Reviewed” section below. Study settings and participant demographics are recorded for all studies that received moderate or high ratings on design and execution and that reported the information. Studies that did not report any information about setting or participant demographics are not displayed. For more information on how participant characteristics are recorded, please see our Resource Guide on Study Participant Characteristics and Settings.

Sometimes study results are reported in more than one document, or a single document reports results from multiple studies. Studies are identified below by their Prevention Services Clearinghouse study identification numbers. To receive a rating of supported or well-supported, the favorable evidence for a program or service must have been obtained from research conducted in a usual care or practice setting.

Studies Rated High

Study 12960

Finnes, A., Enebrink, P., Sampaio, F., Sorjonen, K., Dahl, J., Ghaderi, A., Nager, A., & Feldman, I. (2017). Cost-effectiveness of acceptance and commitment therapy and a workplace intervention for employees on sickness absence due to mental disorders. Journal of Occupational and Environmental Medicine, 59(12), 1211-1220. https://doi.org/10.1097/JOM.0000000000001156

Finnes, A., Ghaderi, A., Dahl, J., Nager, A., & Enebrink, P. (2019). Randomized controlled trial of acceptance and commitment therapy and a workplace intervention for sickness absence due to mental disorders. Journal of Occupational Health Psychology, 24(1), 198-212. https://doi.org/10.1037/ocp0000097

This study was not conducted in a usual care or practice setting (Handbook Version 2.0, Section 7.2.2)
Study 12701

Myin-Germeys, I., van Aubel, E., Vaessen, T., Steinhart, H., Klippel, A., Lafit, G., Viechtbauer, W., Batink, T., van Winkel, R., van der Gaag, M., van Amelsvoort, T., Marcelis, M., Schirmbeck, F., de Haan, L., & Reininghaus, U. (2022). Efficacy of acceptance and commitment therapy in daily life in early psychosis: Results from the multi-center INTERACT randomized controlled trial. Psychotherapy and Psychosomatics, 91(6), 411-423. https://doi.org/10.1159/000522274

Reininghaus, U., Klippel, A., Steinhart, H., Vaessen, T., van Nierop, M., Viechtbauer, W., Batink, T., Kasanova, Z., van Aubel, E., van Winkel, R., Marcelis, M., van Amelsvoort, T., van der Gaag, M., de Haan, L., & Myin-Germeys, I. (2019). Efficacy of acceptance and commitment therapy in daily life (ACT-DL) in early psychosis: Study protocol for a multi-centre randomized controlled trial. Trials, 20, Article 769. https://doi.org/10.1186/s13063-019-3912-4

van Aubel, E., Vaessen, T., Reininghaus, U., & Myin-Germeys, I. (2020). Feasibility and acceptability of acceptance and commitment therapy in daily life (ACT-DL): Patients' perspectives. Schizophrenia Bulletin, 46(Supplement_1), S75-S76. https://doi.org/10.1093/schbul/sbaa031.175

This study was conducted in a usual care or practice setting (Handbook Version 2.0, Section 7.2.2)
Study 13104

Parling, T., Cernvall, M., Ramklint, M., Holmgren, S., & Ghaderi, A. (2016). A randomised trial of acceptance and commitment therapy for anorexia nervosa after daycare treatment, including five-year follow-up. BMC Psychiatry, 16, Article 272. https://doi.org/10.1186/s12888-016-0975-6

This study was conducted in a usual care or practice setting (Handbook Version 2.0, Section 7.2.2)
In addition to full sample analyses, this study also reported analyses that included the following subgroups:
Study 12669

Frølund Pedersen, H. F., Agger, J. L., Frostholm, L., Søndergaard Jensen, J., Fink, P., & Schröder, A. (2017). High- and low-dose acceptance and commitment group therapy (ACT-G) versus enhanced care for patients with severe functional somatic syndromes (STreSS-4): Preliminary results from a randomized controlled trial. Journal of Psychosomatic Research, 97, 150. https://doi.org/10.1016/j.jpsychores.2017.03.240

Frølund Pedersen, H. F., Agger, J. L., Frostholm, L., Jensen, J. S., Ørnbøl, E., Fink, P., & Schröder, A. (2019). Acceptance and commitment group therapy for patients with multiple functional somatic syndromes: A three-armed trial comparing ACT in a brief and extended version with enhanced care. Psychological Medicine, 49(6), 1005-1014. https://doi.org/10.1017/S0033291718001666

This study was conducted in a usual care or practice setting (Handbook Version 2.0, Section 7.2.2)
Study 13510

Westin, V. Z., Schulin, M., Hesser, H., Karlsson, M., Noe, R. Z., Olofsson, U., Stalby, M., Wisung, G., & Andersson, G. (2011). Acceptance and commitment therapy versus tinnitus retraining therapy in the treatment of tinnitus: A randomised controlled trial. Behaviour Research and Therapy, 49(11), 737-747. https://doi.org/10.1016/j.brat.2011.08.001

This study was conducted in a usual care or practice setting (Handbook Version 2.0, Section 7.2.2)
Study 13435

Grazzi, L., Bernstein, C., Raggi, A., Sansone, E., Grignani, E., Searl, M., & Rizzoli, P. (2019). ACT for migraine: Effect of acceptance and commitment therapy (ACT) for high-frequency episodic migraine without aura: Preliminary data of a phase-II, multicentric, randomized, open-label study. Neurological Sciences, 40(Suppl 1), 191-192. https://doi.org/10.1007/s10072-019-03802-w

Grazzi, L., Andrasik, F., Rizzoli, P., Bernstein, C., Sansone, E., & Raggi, A. (2021). Acceptance and commitment therapy for high frequency episodic migraine without aura: Findings from a randomized pilot investigation. Headache: The Journal of Head and Face Pain, 61, 895-905. https://doi.org/10.1111/head.14139

This study was conducted in a usual care or practice setting (Handbook Version 2.0, Section 7.2.2)

Studies Rated Moderate

Study 12487

Bomyea, J., Lang, A. J., & Schnurr, P. P. (2017). TBI and treatment response in a randomized trial of acceptance and commitment therapy. Journal of Head Trauma Rehabilitation, 32(5), E35-E43. https://doi.org/10.1097/HTR.0000000000000278

Lang, A. J., Schnurr, P. P., Jain, S., He, F., Walser, R. D., Bolton, E., Benedek, D. M., Norman, S. B., Sylvers, P., Flashman, L., Strauss, J., Raman, R., & Chard, K. M. (2017). Randomized controlled trial of acceptance and commitment therapy for distress and impairment in OEF/OIF/OND veterans. Psychological Trauma: Theory, Research, Practice and Policy, 9(Suppl 1), 74-84. https://doi.org/10.1037/tra0000127

Lang, A. J., Schnurr, P. P., Jain, S., Raman, R., Walser, R., Bolton, E., Chabot, A., & Benedek, D. (2012). Evaluating transdiagnostic treatment for distress and impairment in veterans: A multi-site randomized controlled trial of acceptance and commitment therapy. Contemporary Clinical Trials, 33(1), 116-123. https://doi.org/10.1016/j.cct.2011.08.007

Gobin, R. L., Strauss, J. L., Golshan, S., Allard, C. B., Bomyea, J., Schnurr, P. P., & Lang, A. J. (2019). Gender differences in response to acceptance and commitment therapy among operation enduring freedom/operation Iraqi freedom/operation new dawn veterans. Women's Health Issues, 29(3), 267-273. https://doi.org/10.1016/j.whi.2019.03.003

This study was conducted in a usual care or practice setting (Handbook Version 2.0, Section 7.2.2)
In addition to full sample analyses, this study also reported analyses that included the following subgroups:

Studies Rated Low

Study 12544

van Aubel, E., Bakker, J. M., Batink, T., Michielse, S., Goossens, L., Lange, I., Schruers, K., Lieverse, R., Marcelis, M., van Amelsvoort, T., van Os, J., Wichers, M., Vaessen, T., Reininghaus, U., & Myin-Germeys, I. (2020). Blended care in the treatment of subthreshold symptoms of depression and psychosis in emerging adults: A randomised controlled trial of acceptance and commitment therapy in daily-life (ACT-DL). Behaviour Research and Therapy, 128, Article 103592. https://doi.org/10.1016/j.brat.2020.103592

This study received a low rating because it did not meet design confound standards.
Study 12603

Witlox, M., Garnefski, N., Kraaij, V., de Waal, M. W. M., Smit, F., Bohlmeijer, E., & Spinhoven, P. (2021). Blended acceptance and commitment therapy versus face-to-face cognitive behavioral therapy for older adults with anxiety symptoms in primary care: Pragmatic single-blind cluster randomized trial. Journal of Medical Internet Research, 23(3), Article e24366. https://doi.org/10.2196/24366

Witlox, M., Kraaij, V., Garnefski, N., de Waal, M. W. M., Smit, F., Hoencamp, E., Gussekloo, J., Bohlmeijer, E. T., & Spinhoven, P. (2018). An internet-based acceptance and commitment therapy intervention for older adults with anxiety complaints: Study protocol for a cluster randomized controlled trial. Trials, 19(1), Article 502. https://doi.org/10.1186/s13063-018-2731-3

This study received a low rating because the standards for addressing missing data were not met.
Study 12605

Chong, Y.-Y., Mak, Y.-W., Leung, S.-P., Lam, S.-Y., & Loke, A. Y. (2019). Acceptance and commitment therapy for parental management of childhood asthma: An RCT. Pediatrics, 143(2), Article e20181723. https://doi.org/10.1542/peds.2018-1723

Chong, Y. Y., Mak, Y. W., & Loke, A. Y. (2020). The role of parental psychological flexibility in childhood asthma management: An analysis of cross-lagged panel models. Journal of Psychosomatic Research, 137, Article 110208. https://doi.org/10.1016/j.jpsychores.2020.110208

This study received a low rating because it did not meet design confound standards.
Study 13009

Puolakanaho, A., Tolvanen, A., Kinnunen, S. M., & Lappalainen, R. (2020). A psychological flexibility-based intervention for burnout: A randomized controlled trial. Journal of Contextual Behavioral Science, 15, 52-67. https://doi.org/10.1016/j.jcbs.2019.11.007

This study received a low rating because baseline equivalence of the intervention and comparison groups was necessary and not demonstrated.
Study 12464

Folke, F., Parling, T., & Melin, L. (2012). Acceptance and commitment therapy for depression: A preliminary randomized clinical trial for unemployed on long-term sick leave. Cognitive and Behavioral Practice, 19(4), 583-594. https://doi.org/10.1016/j.cbpra.2012.01.002

This study received a low rating because it did not meet design confound standards.
Study 13086

Fogelkvist, M., Gustafsson, S. A., Kjellin, L., & Parling, T. (2020). Acceptance and commitment therapy to reduce eating disorder symptoms and body image problems in patients with residual eating disorder symptoms: A randomized controlled trial. Body Image, 32, 155-166. https://doi.org/10.1016/j.bodyim.2020.01.002

This study received a low rating because it did not meet the statistical model standards.
Study 12432

A-Tjak, J. G. L., Morina, N., Boendermaker, W. J., Topper, M., & Emmelkamp, P. M. G. (2020). Explicit and implicit attachment and the outcomes of acceptance and commitment therapy and cognitive behavioral therapy for depression. BMC Psychiatry, 20, Article 155. https://doi.org/10.1186/s12888-020-02547-7

A-Tjak, J. G. L., Morina, N., Topper, M., & Emmelkamp, P. M. G. (2018). A randomized controlled trial in routine clinical practice comparing acceptance and commitment therapy with cognitive behavioral therapy in the treatment of major depressive disorder. Psychotherapy and Psychosomatics, 87(3), 154-163. https://doi.org/10.1159/000486807

A-Tjak, J. G. L., Morina, N., Topper, M., & Emmelkamp, P. M. G. (2021). One year follow-up and mediation in cognitive behavioral therapy and acceptance and commitment therapy for adult depression. BMC Psychiatry, 21, Article 41. https://doi.org/10.1186/s12888-020-03020-1

This study received a low rating because baseline equivalence of the intervention and comparison groups was necessary and not demonstrated.
Study 13399

Lytsy, P., Carlsson, L., & Anderzén, I. (2017). Effectiveness of two vocational rehabilitation programmes in women with long-term sick leave due to pain syndrome or mental illness: 1-year follow-up of a randomized controlled trial. Journal of Rehabilitation Medicine, 49(2), 170-177. https://doi.org/10.2340/16501977-2188

Berglund, E., Anderzén, I., Andersén, Å., Carlsson, L., Gustavsson, C., Wallman, T., & Lytsy, P. (2018). Multidisciplinary intervention and acceptance and commitment therapy for return-to-work and increased employability among patients with mental illness and/or chronic pain: A randomized controlled trial. International Journal of Environmental Research and Public Health, 15(11), Article 2424. https://doi.org/10.3390/ijerph15112424

Andersén, Å., Larsson, K., Lytsy, P., Berglund, E., Kristiansson, P., & Anderzén, I. (2018). Strengthened general self-efficacy with multidisciplinary vocational rehabilitation in women on long-term sick leave: A randomised controlled trial. Journal of Occupational Rehabilitation, 28(4), 691-700. https://doi.org/10.1007/s10926-017-9752-8

Finnes, A., Anderzén, I., Pingel, R., Dahl, J., Molin, L., & Lytsy, P. (2021). Comparing the efficacy of multidisciplinary assessment and treatment, or acceptance and commitment therapy, with treatment as usual on health outcomes in women on long-term sick leave-A randomised controlled trial. International Journal of Environmental Research and Public Health, 18, Article 1754. https://doi.org/10.3390/ijerph18041754

This study received a low rating because it did not meet design confound standards.

Studies Reviewed for Risk of Harm

Study 12499

Luciano, J. V., Guallar, J. A., Aguado, J., López-del-Hoyo, Y., Olivan, B., Magallón, R., Alda, M., Serrano-Blanco, A., Gili, M., & Garcia-Campayo, J. (2014). Effectiveness of group acceptance and commitment therapy for fibromyalgia: A 6-month randomized controlled trial (EFFIGACT study). PAIN, 155(4), 693-702. https://doi.org/10.1016/j.pain.2013.12.029

Study 13080

Clarke, S., Kingston, J., James, K., Bolderston, H., & Remington, B. (2014). Acceptance and commitment therapy group for treatment-resistant participants: A randomized controlled trial. Journal of Contextual Behavioral Science, 3(3), 179-188. https://doi.org/10.1016/j.jcbs.2014.04.005

Study 12948

Ahmadi Ghahnaviyeh, L., Bagherian, R., Feizi, A., Afshari, A., & Mostafavi Darani, F. (2020). The effectiveness of acceptance and commitment therapy on quality of life in a patient with myocardial infarction: A randomized control trial. Iranian Journal of Psychiatry, 15(1), 1-9.

Study 12707

Scott, W., Chilcot, J., Guildford, B., Daly-Eichenhardt, A., & McCracken, L. M. (2018). Feasibility randomized-controlled trial of online acceptance and commitment therapy for patients with complex chronic pain in the United Kingdom. European Journal of Pain, 22(8), 1473-1484. https://doi.org/10.1002/ejp.1236

Study 12646

Muscara, F., McCarthy, M. C., Rayner, M., Nicholson, J. M., Dimovski, A., McMillan, L., Hearps, S. J. C., Yamada, J., Burke, K., Walser, R., & Anderson, V. A. (2020). Effect of a videoconference-based online group intervention for traumatic stress in parents of children with life-threatening illness: A randomized clinical trial. JAMA Network Open, 3(7), Article e208507. https://doi.org/10.1001/jamanetworkopen.2020.8507

Study 12679

Hawkes, A., Chambers, S. K., Pakenham, K. I., Patrao, T. A., Baade, P. D. Lynch, B. M., Aitken, J. F., Meng, X., & Courneya, K. (2013). Effects of a multiple health behavior change intervention (CanChange) for survivors of colorectal cancer: A randomized controlled trial. Journal of Clinical Oncology, 31(20), 2313-2321. https://doi.org/10.1200/JCO.2012.45.5873

Hawkes, A., Pakenham, K., Chambers, S., Patrao, T., & Courneya, K. (2014). Effects of a multiple health behavior change intervention for colorectal cancer survivors on psychosocial outcomes and quality of life: A randomized controlled trial. Annals of Behavioral Medicine, 48(3), 359-370. https://doi.org/10.1007/s12160-014-9610-2

Gordon, L. G., Patrao, T., Kularatna, S., & Hawkes, A. L. (2015). A telephone‐delivered multiple health behaviour change intervention for colorectal cancer survivors: Making the case for cost‐effective healthcare. European Journal of Cancer Care, 24(6), 854-861. https://doi.org/10.1111/ecc.12345

Study 12482

Johns, S. A., Stutz, P. V., Talib, T. L., Cohee, A. A., Beck‐Coon, K. A., Brown, L. F., Wilhelm, L. R., Monahan, P. O., LaPradd, M. L., Champion, V. L., Miller, K. D., & Giesler, R. B. (2020). Acceptance and commitment therapy for breast cancer survivors with fear of cancer recurrence: A 3-arm pilot randomized controlled trial. Cancer, 126(1), 211-218. https://doi.org/10.1002/cncr.32518

Study 12974

Järvelä-Reijonen, E., Karhunen, L., Sairanen, E., Muotka, J., Lindroos, S., Laitinen, J., Puttonen, S., Peuhkuri, K., Hallikainen, M., Pihlajamäki, J., Korpela, R., Ermes, M., Lappalainen, R., & Kolehmainen, M. (2018). The effects of acceptance and commitment therapy on eating behavior and diet delivered through face-to-face contact and a mobile app: A randomized controlled trial. International Journal of Behavioral Nutrition and Physical Activity, 15, Article 22. https://doi.org/10.1186/s12966-018-0654-8

Järvelä-Reijonen, E., Puttonen, S., Karhunen, L., Sairanen, E., Laitinen, J., Kolehmainen, M., Pihlajamäki, J., Kujala, U. M., Korpela, R., Ermes, M., Lappalainen, R., & Kolehmainen, M. (2020). The effects of acceptance and commitment therapy (ACT) intervention on inflammation and stress biomarkers: A randomized controlled trial. International Journal of Behavioral Medicine, 27(5), 539-555. https://doi.org/10.1007/s12529-020-09891-8

Mattila, E., Lappalainen, R., Välkkynen, P., Sairanen, E., Lappalainen, P., Karhunen, L., Peuhkuri, K., Korpela, R., Kolehmainen, M., & Ermes, M. (2016). Usage and dose response of a mobile acceptance and commitment therapy app: Secondary analysis of the intervention arm of a randomized controlled trial. JMIR MHealth and UHealth, 4(3), Article e90. https://doi.org/10.2196/mhealth.5241

Lappalainen, R., Sairanen, E., Järvelä, E., Rantala, S., Korpela, R., Puttonen, S., Kujala, U. M., Myllymäki, T., Peuhkuri, K., Mattila, E., Kaipainen, K., Ahtinen, A., Karhunen, L., Pihlajamäki, J., Järnefelt, H., Laitinen, J., Kutinlahti, E., Saarelma, O., Ermes, M., & Kolehmainen, M. (2014). The effectiveness and applicability of different lifestyle interventions for enhancing wellbeing: The study design for a randomized controlled trial for persons with metabolic syndrome risk factors and psychological distress. BMC Public Health, 14, Article 310. https://doi.org/10.1186/1471-2458-14-310

Sairanen, E., Tolvanen, A., Karhunen, L., Kolehmainen, M., Järvelä-Reijonen, E., Lindroos, S., Peuhkuri, K., Korpela, R., Ermes, M., Mattila, E., & Lappalainen, R. (2017). Psychological flexibility mediates change in intuitive eating regulation in acceptance and commitment therapy interventions. Public Health Nutrition, 20(9), 1681-1691. https://pmc.ncbi.nlm.nih.gov/articles/PMC10261668/

Study 12677

Van der Gucht, K., Griffith, J. W., Hellemans, R., Bockstaele, M., Pascal-Claes, F., & Raes, F. (2017). Acceptance and commitment therapy (ACT) for adolescents: Outcomes of a large-sample, school-based, cluster-randomized controlled trial. Mindfulness, 8(2), 408-416. https://doi.org/10.1007/s12671-016-0612-y

Study 12430

Alipour, F. (2019). The effectiveness of ACT treatment in reducing the symptoms of depression in patients with epilepsy. Middle East Journal of Family Medicine, 17(6), 26-36. https://doi.org/10.5742MEWFM.2019.93655

Study 12436

Biglan, A., Layton, G. L., Jones, L. B., Hankins, M., & Rusby, J. C. (2013). The value of workshops on psychological flexibility for early childhood special education staff. Topics in Early Childhood Special Education, 32(4), 196-210. https://doi.org/10.1177/0271121411425191

Study 12460

Eisenbeck, N., Sheitz, K., & Szekeres, B. (2016). A brief acceptance and commitment therapy-based intervention among violence-prone male inmates delivered by novice therapists. Psychology, Society & Education, 8(3), 187-199.

Study 12478

Hayes, L., Boyd, C. P., & Sewell, J. (2011). Acceptance and commitment therapy for the treatment of adolescent depression: A pilot study in a psychiatric outpatient setting. Mindfulness, 2(2), 86-94. https://doi.org/10.1007/s12671-011-0046-5

Study 12485

Kohtala, A., Lappalainen, R., Savonen, L., Timo, E., & Tolvanen, A. (2015). A four-session acceptance and commitment therapy based intervention for depressive symptoms delivered by masters degree level psychology students: A preliminary study. Behavioural & Cognitive Psychotherapy, 43(3), 360-373. https://doi.org/10.1017/S1352465813000969

Kohtala, A., Muotka, J., & Lappalainen, R. (2017). What happens after five years? The long-term effects of a four-session acceptance and commitment therapy delivered by student therapists for depressive symptoms. Journal of Contextual Behavioral Science, 6, 230-238. https://doi.org/10.1016/j.jcbs.2017.03.003

Study 12486

Kyllönen, H. M., Muotka, J., Puolakanaho, A., Astikainen, P., Keinonen, K., & Lappalainen, R. (2018). A brief acceptance and commitment therapy intervention for depression: A randomized controlled trial with 3-year follow-up for the intervention group. Journal of Contextual Behavioral Science, 10, 55-63. https://doi.org/10.1016/j.jcbs.2018.08.009

Study 13474

Morrison, K. L., Smith, B. M., Ong, C. W., Lee, E. B., Friedel, J. E., Odum, A., Madden, G. J., Ledermann, T., Rung, J., & Twohig, M. P. (2020). Effects of acceptance and commitment therapy on impulsive decision-making. Behavior Modification, 44(4), 600-623. https://doi.org/10.1177/0145445519833041

Study 13475

Mosher, C. E., Secinti, E., Hirsh, A. T., Hanna, N., Einhorn, L. H., Jalal, S. I., Durm, G., Champion, V. L., & Johns, S. A. (2019). Acceptance and commitment therapy for symptom interference in advanced lung cancer and caregiver distress: A pilot randomized trial. Journal of Pain and Symptom Management, 58(4), 632-644. https://doi.org/10.1016/j.jpainsymman.2019.06.021

Study 13477

Mo'tamedi, H., Rezaiemaram, P., & Tavallaie, A. (2012). The effectiveness of a group-based acceptance and commitment additive therapy on rehabilitation of female outpatients with chronic headache: Preliminary findings reducing 3 dimensions of headache impact. Headache: The Journal of Head and Face Pain, 52(7), 1106-1119. https://doi.org/10.1111/j.1526-4610.2012.02192.x

Study 13478

Nelson, C. J., Saracino, R. M., Napolitano, S., Pessin, H., Narus, J. B., & Mulhall, J. P. (2019). Acceptance and commitment therapy to increase adherence to penile injection therapy-based rehabilitation after radical prostatectomy: Pilot randomized controlled trial. Journal of Sexual Medicine, 16(9), 1398-1408. https://doi.org/10.1016/j.jsxm.2019.05.013

Study 13479

Nes, A. A. G., van Dulmen, S., Wicksell, R., Fors, E. A., & Eide, H. (2017). Analyzing change processes resulting from a smartphone maintenance intervention based on acceptance and commitment therapy for women with chronic widespread pain. International Journal of Behavioral Medicine, 24(2), 215-229. https://doi.org/10.1007/s12529-016-9590-7

Kristjánsdóttir, O. B., Fors, E. A., Eide, E., Finset, A., Stensrud, T. L., van Dulmen, S., Wigers, S. H., & Eide, H. (2013). A smartphone-based intervention with diaries and therapist-feedback to reduce catastrophizing and increase functioning in women with chronic widespread pain: Randomized controlled trial. Journal of Medical Internet Research, 15(1), Article e5. https://doi.org/10.2196/jmir.2249

Study 13480

Nourian, L., & Aghaei, A. (2015). Effectiveness of acceptance and commitment therapy on psychological flexibility in obese women. Iranian Journal of Diabetes and Obesity, 7(3), 133-137.

Study 13481

O'Brien, W. H., Singh, R., Horan, K., Moeller, M. T., Wasson, R., & Jex, S. M. (2019). Group-based acceptance and commitment therapy for nurses and nurse aides working in long-term care residential settings. The Journal of Alternative and Complementary Medicine, 25(7), 753-761. https://doi.org/10.1089/acm.2019.0087

Study 13494

Scott, W., Guildford, B. J., Badenoch, J., Driscoll, E., Chilcot, J., Norton, S., Kemp, H. I., Lee, M. J., Lwanga, J., Boffito, M., Moyle, G., Post, F. A., Campbell, L., Josh, J., Clift, P., C de C Williams, A., Rice, A. S., & McCracken, L. M. (2021). Feasibility randomized-controlled trial of online acceptance and commitment therapy for painful peripheral neuropathy in people living with HIV: The OPEN study. European Journal of Pain, 25(7), 1493-1507. https://doi.org/10.1002/ejp.1762

Study 13500

Steiner, J. L., Bogusch, L., & Bigatti, S. M. (2013). Values-based action in fibromyalgia: Results from a randomized pilot of acceptance and commitment therapy. Health Psychology Research, 1(3), Article e34. https://pmc.ncbi.nlm.nih.gov/articles/PMC4768570/

Study 13502

Taheri, A. A., Foroughi, A. A., Mohammadian, Y., Ahmadi, S. M., Heshmati, K., Hezarkhani, L. A., & Parvizifard, A. A. (2020). The effectiveness of acceptance and commitment therapy on pain acceptance and pain perception in patients with painful diabetic neuropathy: A randomized controlled trial. Diabetes Therapy, 11(8), 1695-1708. https://doi.org/10.1007/s13300-020-00851-9

Study 13504

Trompetter, H. R., Bohlmeijer, E. T., Fox, J. P., & Schreurs, K. M. (2015a). Psychological flexibility and catastrophizing as associated change mechanisms during online acceptance & commitment therapy for chronic pain. Behaviour Research and Therapy, 74, 50-59. https://doi.org/10.1016/j.brat.2015.09.001

Trompetter, H. R., Bohlmeijer, E. T., Veehof, M. M., & Schreurs, K. M. (2015b). Internet-based guided self-help intervention for chronic pain based on acceptance and commitment therapy: A randomized controlled trial. Journal of Behavioral Medicine, 38, 66-80. https://doi.org/10.1007/s10865-014-9579-0

Trompetter, H. R., Bohlmeijer, E. T., Lamers, S. M. A., & Schreurs, K. M. G. (2016). Positive psychological wellbeing is required for online self-help acceptance and commitment therapy for chronic pain to be effective. Frontiers in Psychology, 7, Article 535. https://doi.org/10.3389/fpsyg.2016.00353

Study 13513

Wicksell, R. K., Ahlqvist, J., Bring, A., Melin, L., & Olsson, G. L. (2008). Can exposure and acceptance strategies improve functioning and life satisfaction in people with chronic pain and whiplash-associated disorders (WAD)? A randomized controlled trial. Cognitive Behaviour Therapy, 37(3), 169-182. https://doi.org/10.1080/16506070802078970

Wicksell, R. K., Olsson, G. L., & Hayes, S. C. (2010). Psychological flexibility as a mediator of improvement in acceptance and commitment therapy for patients with chronic pain following whiplash. European Journal of Pain, 14(10), 1059.e1-1059.e11. https://doi.org/10.1016/j.ejpain.2010.05.001

Study 13520

Zakiei, A., Khazaie, H., Rostampour, M., Lemola, S., Esmaeili, M., Dürsteler, K., Brühl, A. B., Sadeghi-Bahmani, D., & Brand, S. (2021). Acceptance and commitment therapy (ACT) improves sleep quality, experiential avoidance, and emotion regulation in individuals with insomnia-results from a randomized interventional study. Life, 11(2), Article 133. https://doi.org/10.3390/life11020133

Study 13519

Yousefi, M., Younesi, S. J., Farhoudian, A., & Safi, M. H. (2020). Effect of acceptance and commitment therapy on impulsivity of patients with methamphetamine use disorder. Archives of Rehabilitation, 21(3), 406-421. https://doi.org/10.32598/RJ.21.3.3028.1

Study 13489

Rose, M., Graham, C. D., O'Connell, N., Vari, C., Edwards, V., Taylor, E., McCracken, L. M., Radunovic, A., Rakowicz, W., Norton, S., & Chalder, T. (2023). A randomised controlled trial of acceptance and commitment therapy for improving quality of life in people with muscle diseases. Psychological Medicine, 53(8), 3511-3524. https://doi.org/10.1017/S0033291722000083

Rose, M. R., Norton, S., Vari, C., Edwards, V., McCracken, L., Graham, C. D., Radunovic, A., & Chalder, T. (2018). Acceptance and commitment therapy for muscle disease (ACTMus): Protocol for a two-arm randomised controlled trial of a brief guided self-help ACT programme for improving quality of life in people with muscle diseases. BMJ Open, 8(10), Article e022083. https://doi.org/10.1136/bmjopen-2018-022083

Study 13461

Lloyd, J., Bond, F., & Flaxman, P. (2013). The value of psychological flexibility: Examining psychological mechanisms underpinning a cognitive behavioural therapy intervention for burnout. Work & Stress, 27(2), 181-199. https://doi.org/10.1080/02678373.2013.782157

Study 13452

Lappalainen, R., Lehtonen, T., Skarp, E., Taubert, E., Ojanen, M., & Hayes, S. C. (2007). The impact of CBT and ACT models using psychology trainee therapists: A preliminary controlled effectiveness trial. Behavior Modification, 31(4), 488-511. https://doi.org/10.1177/0145445506298436

Study 13446

Jensen, K. B., Kosek, E., Wicksell, R., Kemani, M., Olsson, G., Merle, J. V., Kadetoff, D., & Ingvar, M. (2012). Cognitive behavioral therapy increases pain-evoked activation of the prefrontal cortex in patients with fibromyalgeia. PAIN, 153(7), 1495-1503. https://doi.org/10.1016/j.pain.2012.04.010

Study 12434

Avdagic, E., Morrissey, S. A., & Boschen, M. J. (2014). A randomised controlled trial of acceptance and commitment therapy and cognitive-behaviour therapy for generalised anxiety disorder. Behaviour Change, 31(2), 110-130. https://doi.org/10.1017/bec.2014.5

Study 12438

Fledderus, M., Bohlmeijer, E. T., Smit, F., & Westerhof, G. J. (2010). Mental health promotion as a new goal in public mental health care: A randomized controlled trial of an intervention enhancing psychological flexibility. American Journal of Public Health, 100(12), 2372-2378. https://doi.org/10.2105/AJPH.2010.196196

Bohlmeijer, E. T., Fledderus, M., Rokx, T. A. J. J., & Pieterse, M. E. (2011). Efficacy of an early intervention based on acceptance and commitment therapy for adults with depressive symptomology: Evaluation in a randomized controlled trial. Behaviour Research and Therapy, 49(1), 62-67. https://doi.org/10.1016/j.brat.2010.10.003

Study 12450

Davison, T. E., Eppingstall, B., Runci, S., & O'Connor, D. W. (2017). A pilot trial of acceptance and commitment therapy for symptoms of depression and anxiety in older adults residing in long-term care facilities. Aging & Mental Health, 21(7), 766-773. https://doi.org/10.1080/13607863.2016.1156051

Study 12451

Davoudi, M., Taheri, A. A., Foroughi, A. A., Ahmadi, S. M., & Heshmati, K. (2020). Effectiveness of acceptance and commitment therapy (ACT) on depression and sleep quality in painful diabetic neuropathy: A randomized clinical trial. Journal of Diabetes & Metabolic Disorders, 19(2), 1081-1088. https://doi.org/10.1007/s40200-020-00609-x

Study 12459

Ducasse, D., René, E., Béziat, S., Guillaume, S., Courtet, P., & Olié, E. (2014). Acceptance and commitment therapy for management of suicidal patients: A pilot study. Psychotherapy and Psychosomatics, 83(6), 374-376. https://doi.org/10.1159/000365974

Ducasse, D., Jaussent, I., Arpon-Brand, V., Vienot, M., Laglaoui, C., Béziat, S., Calati, R., Carrière, I., Guillaume, S., Courtet, P., & Olié, E. (2018). Acceptance and commitment therapy for the management of suicidal patients: A randomized controlled trial. Psychotherapy & Psychosomatics, 87(4), 211-222. https://doi.org/10.1159/000488715

Study 12467

Livheim, F., Hayes, L., Ghaderi, A., Magnusdottir, T., Högfeldt, A., Rowse, J., Turner, S., Hayes, S. C., & Tengström, A. (2015). The effectiveness of acceptance and commitment therapy for adolescent mental health: Swedish and Australian pilot outcomes. Journal of Child and Family Studies, 24(4), 1016-1030. https://doi.org/10.1007/s10826-014-9912-9 [Australian Outcomes Study]

Study 12443

Burckhardt, R., Manicavasagar, V., Batterham, P. J., Hadzi-Pavlovic, D., & Shand, F. (2017). Acceptance and commitment therapy universal prevention program for adolescents: A feasibility study. Child and Adolescent Psychiatry and Mental Health, 11, Article 27. https://doi.org/10.1186/s13034-017-0164-5

Study 13443

Ito, M., & Muto, T. (2020). Effectiveness of acceptance and commitment therapy for irritable bowel syndrome non-patients: A pilot randomized waiting list controlled trial. Journal of Contextual Behavioral Science, 15, 85-91. https://doi.org/10.1016/j.jcbs.2019.11.009

Study 13432

Ghoman, S., & Shairi, M. R. (2014). The effectiveness of acceptance and commitment therapy for children with chronic pain on the quality of life on 7 to 12 year-old children. International Journal of Pediatrics, 2(3.2), 47-55.

Study 13431

Gharaei-Ardakani, S., Tavallaie, S. A., Dehghanizade, Z., Tork, M., Eydi-Baygi, M., & Nikbakhsh, H. (2014). The effectiveness of acceptance and commitment therapy on mental health in women with chronic pain. Bulletin of Environment, Pharmacology, and Life Sciences, 3(8), 78-83. https://bepls.com/july_2014.html

Study 13428

Giovannetti, A. M., Quintas, R., Tramacere, I., Giordano, A., Confalonieri, P., Messmer Uccelli, M., Solari, A., & Pakenham, K. I. (2020). A resilience group training program for people with multiple sclerosis: Results of a pilot single-blind randomized controlled trial and nested qualitative study. PLoS ONE, 15(4), Article e0231380. https://doi.org/10.1371/journal.pone.0231380

Study 13422

Enoch, M. R., & Dixon, M. R. (2017). The use of a child-based acceptance and commitment therapy curriculum to increase attention. Child & Family Behavior Therapy, 39(3), 200-224. https://doi.org/10.1080/07317107.2017.1338454

Study 13419

Dixon, M. R., Wilson, A. N., & Habib, R. (2016). Neurological evidence of acceptance and commitment therapy effectiveness in college-age gamblers. Journal of Contextual Behavioral Science, 5(2), 80-88. https://doi.org/10.1016/j.jcbs.2016.04.004

Study 13418

Crosby, J. M., & Twohig, M. P. (2016). Acceptance and commitment therapy for problematic internet pornography use: A randomized trial. Behavior Therapy, 47(3), 355-366. https://doi.org/10.1016/j.beth.2016.02.001

Study 13416

Cosio, D. (2016). Practice-based evidence for outpatient, acceptance & commitment therapy for veterans with chronic, non-cancer pain. Journal of Contextual Behavioral Science, 5(1), 23-32. https://doi.org/10.1016/j.jcbs.2015.12.002

Study 13402

Bricker, J. B., Mull, K. E., Sullivan, B. M., & Forman, E. M. (2021). Efficacy of telehealth acceptance and commitment therapy for weight loss: A pilot randomized clinical trial. Translational Behavioral Medicine, 11, 1527-1536. https://doi.org/10.1093/tbm/ibab012

Study 13396

Azadi, M. M., Manshaee, G., & Golparvar, M. (2019). Comparing the effectiveness of mobile social network-based mindfulness intervention with acceptance and commitment therapy and mindfulness therapy on self-management and glycated haemoglobin level among patients with type 2 diabetes. Journal of Shahrekord University of Medical Sciences, 21(5), 221-228. https://doi.org/10.34172/jsums.2019.39

Study 13393

Alonso, M. A., López, A., Losada, A., & González, J. L. (2013). Acceptance and commitment therapy and selective optimization with compensation for older people with chronic pain: A pilot study. Behavioral Psychology / Psicologia Conductual: Revista Internacional Clinica y de La Salud, 21(1), 59-79.

Study 13392

Aghalar, S., Manesh, F. M., Khorami, N. S., & Hafezi, F. (2020). The effectiveness of acceptance- and commitment-based therapy on perception of disease in patients with irritable bowel syndrome. International Archives of Health Sciences, 7(3), 137-142. https://doi.org/10.4103/iahs.iahs_80_19

Study 13391

Abdollahi, S., Hatami, M., Manesh, F. M., & Askari, P. (2020). The effectiveness of acceptance and commitment therapy on the self-care and adherence to treatment in patients with type 2 diabetes. International Archives of Health Sciences, 7(2), 78-83. https://doi.org/10.4103/iahs.iahs_13_20

Study 13113

Yildiz, E., & Aylaz, R. (2021). How counseling based on acceptance and commitment therapy and supported with motivational interviewing affects levels of functional recovery in patients diagnosed with schizophrenia: A quasi-experimental study. Clinical Nursing Research, 30(5), 599-615. https://doi.org/10.1177/1054773820935592

Study 13110

Weineland, S., Arvidsson, D., Kakoulidis, T. P., & Dahl, J. (2012). Acceptance and commitment therapy for bariatric surgery patients, a pilot RCT. Obesity Research & Clinical Practice, 6(1), e21-e30. https://doi.org/10.1016/j.orcp.2011.04.004

Study 13105

Polat, H., & Karakaş, S. A. (2021). The effect of acceptance and commitment therapy orientated anger management training on anger ruminations and impulsivity levels in forensic psychiatric patients: A randomized controlled trial. Perspectives in Psychiatric Care, 57(4), 1616-1627. https://doi.org/10.1111/ppc.12726

Study 13103

Palmeira, L., Pinto-Gouveia, J., & Cunha, M. (2017). Exploring the efficacy of an acceptance, mindfulness & compassionate-based group intervention for women struggling with their weight (Kg-Free): A randomized controlled trial. Appetite, 112, 107-116. https://doi.org/10.1016/j.appet.2017.01.027

Study 13100

Moradi, F., Ghadiri-Anari, A., Dehghani, A., Vaziri, S. R., & Enjezab, B. (2020). The effectiveness of counseling based on acceptance and commitment therapy on body image and self-esteem in polycystic ovary syndrome: An RCT. International Journal of Reproductive Biomedicine, 18(4), 243-252. https://doi.org/10.18502/ijrm.v13i4.6887

Study 12497

Livheim, F., Hayes, L., Ghaderi, A., Magnusdottir, T., Högfeldt, A., Rowse, J., Turner, S., Hayes, S. C., & Tengström, A. (2015). The effectiveness of acceptance and commitment therapy for adolescent mental health: Swedish and Australian pilot outcomes. Journal of Child and Family Studies, 24(4), 1016-1030. https://doi.org/10.1007/s10826-014-9912-9 [Swedish Outcomes Study]

Study 12475

Gumley, A., White, R., Briggs, A., Ford, I., Barry, S., Stewart, C., Beedie, S., McTaggart, J., Clarke, C., MacLeod, R., Lidstone, E., Riveros, B. S., Young, R., & McLeod, H. (2017). A parallel group randomised open blinded evaluation of acceptance and commitment therapy for depression after psychosis: Pilot trial outcomes (ADAPT). Schizophrenia Research, 183, 143-150. https://doi.org/10.1016/j.schres.2016.11.026

Gumley, A., White, R., Briggs, A., Ford, I., Barry, S., Stewart, C., Beedie, S., Clarke, C., MacLeod, R., Lidstone, E., Nam, J., & McLeod, H. (2016). A parallel group randomised open blinded evaluation of acceptance and commitment therapy for depression after psychosis: Pilot trial protocol (ADAPT). Psychosis, 8(2), 143-155. https://doi.org/10.1080/17522439.2015.1100669

Study 12476

Hadlandsmyth, K., Dindo, L. N., Wajid, R., Sugg, S. L., Zimmerman, M. B., & Rakel, B. A. (2019). A single-session acceptance and commitment therapy intervention among women undergoing surgery for breast cancer: A randomized pilot trial to reduce persistent postsurgical pain. Psycho-Oncology, 28(11), 2210-2217. https://doi.org/10.1002/pon.5209

Study 12477

Hahs, A. D., Dixon, M. R., & Paliliunas, D. (2019). Randomized controlled trial of a brief acceptance and commitment training for parents of individuals diagnosed with autism spectrum disorders. Journal of Contextual Behavioral Science, 12, 154-159. https://doi.org/10.1016/j.jcbs.2018.03.002

Study 12483

Kemani, M. K., Olsson, G. L., Lekander, M., Hesser, H., Andersson, E., & Wicksell, R. K. (2015). Efficacy and cost-effectiveness of acceptance and commitment therapy and applied relaxation for longstanding pain: A randomized controlled trial. The Clinical Journal of Pain, 31(11), 1004-1016. https://doi.org/10.1097/AJP.0000000000000203

Kemani, M. K., Hesser, H., Olsson, G. L., Lekander, M., & Wicksell, R. K. (2016). Processes of change in acceptance and commitment therapy and applied relaxation for long-standing pain. European Journal of Pain, 20(4), 521-531. https://doi.org/10.1002/ejp.754

Study 12491

Lappalainen, R., Lappalainen, P., Puolakanaho, A., Hirvonen, R., Eklund, K., Ahonen, T., Muotka, J., & Kiuru, N. (2021). The youth compass – the effectiveness of an online acceptance and commitment therapy program to promote adolescent mental health: A randomized controlled trial. Journal of Contextual Behavioral Science, 20, 1-12. https://doi.org/10.1016/j.jcbs.2021.01.007

Study 12498

Losada, A., Márquez-González, M., Romero-Moreno, R., Mausbach, B. T., López, J., Fernández-Fernández, V., & Nogales-González, C. (2015b). Cognitive-behavioral therapy (CBT) versus acceptance and commitment therapy (ACT) for dementia family caregivers with significant depressive symptoms: Results of a randomized clinical trial. Journal of Consulting and Clinical Psychology, 83(4), 760-772. https://doi.org/10.1037/ccp0000028

Study 12501

Maghsoudi, Z., Razavi, Z., Razavi, M., & Javadi, M. (2019). Efficacy Of acceptance and commitment therapy for emotional distress in the elderly with type 2 diabetes: A randomized controlled trial. Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy, 12, 2137-2143. https://doi.org/10.2147/DMSO.S221245

Study 12502

Majumdar, S., & Morris, R. (2019). Brief group-based acceptance and commitment therapy for stroke survivors. British Journal of Clinical Psychology, 58(1), 70-90. https://doi.org/10.1111/bjc.12198

Study 12503

Márquez-González, M., Romero-Moreno, R., Cabrera, I., Olmos, R., Pérez-Miguel, A., Losada, A., Tak-Cheng, S., & Haley, W. E. (2020). Tailored versus manualized interventions for dementia caregivers: The functional analysis-guided modular intervention. Psychology and Aging, 35(1), 41-54. https://doi.org/10.1037/pag0000412

Study 12504

McCracken, L. M., Sato, A., & Taylor, G. J. (2013). A trial of a brief group-based form of acceptance and commitment therapy (ACT) for chronic pain in general practice: Pilot outcome and process results. The Journal of Pain, 14(11), 1398-1406. https://doi.org/10.1016/j.jpain.2013.06.011

Study 12507

Mohabbat-Bahar, S., Maleki-Rizi, F., Akbari, M. E., & Joo, M. M. (2015). Effectiveness of group training based on acceptance and commitment therapy on anxiety and depression of women with breast cancer. Iranian Journal of Cancer Prevention, 8(2), 71-76. https://doi.org/10.3889/oamjms.2018.064

Study 13095

Kotze, A. (2020). Compassion, acceptance and commitment in group-based therapeutic interventions to promote recovery. Clinical Psychology Forum (327), 27-32. http://dx.doi.org/10.53841/bpscpf.2020.1.327.27

Study 13085

Farahanifar, M., Heidari, H., Davodi, H., & Aleyasin, S. (2019). The effect of acceptance and commitment therapy on the conflict resolution styles of incompatible marital women. International Archives of Health Sciences, 6(2), 101-107. https://doi.org/10.4103/iahs.iahs_8_19

Study 13084

Khamseh, L. E., & Khoeini, F. (2021). The effectiveness of acceptance and commitment therapy on mental health and mindfulness in mothers of newborns with cystic fibrosis. Journal of Neonatal Nursing, 27(1), 43-46. https://doi.org/10.1016/j.jnn.2020.08.003

Study 13076

Barnes, S. M., Borges, L. M., Smith, G. P., Walser, R. D., Forster, J. E., & Bahraini, N. H. (2021). Acceptance and commitment therapy to promote recovery from suicidal crises: A randomized controlled acceptability and feasibility trial of ACT for life. Journal of Contextual Behavioral Science, 20, 35-45. https://doi.org/10.1016/j.jcbs.2021.02.003

Study 13025

Wicksell, R. K., Melin, L., Lekander, M., & Olsson, G. L. (2009). Evaluating the effectiveness of exposure and acceptance strategies to improve functioning and quality of life in longstanding pediatric pain – a randomized controlled trial. PAIN, 141(3), 248-257. https://doi.org/10.1016/j.pain.2008.11.006

Study 13020

Wang, S., Zhou, Y., Yu, S., Ran, L.-W., Liu, X.-P., & Chen, Y.-F. (2017). Acceptance and commitment therapy and cognitive-behavioral therapy as treatments for academic procrastination: A randomized controlled group session. Research on Social Work Practice, 27(1), 48-58. https://doi.org/10.1177/1049731515577890

Study 13019

Wahyun, E., Nurihsan, J., & Yusuf, S. (2019). Effectiveness of acceptance and commitment therapy to enhance students' wellness. Journal of Evidence-Based Psychotherapies, 19(1), 91-113. https://doi.org/10.24193/jebp.2019.1.6

Study 13017

Vaghee, S., Kashani Lotfabadi, M., Salarhaji, A., Vaghei, N., & Hashemi, B. M. (2018). Comparing the effects of contact-based education and acceptance and commitment-based training on empathy toward mental illnesses among nursing students. Iranian Journal of Psychiatry, 13(2), 120-127.

Study 13015

Takahashi, F., Ishizu, K., Matsubara, K., Ohtsuki, T., & Shimoda, Y. (2020). Acceptance and commitment therapy as a school-based group intervention for adolescents: An open-label trial. Journal of Contextual Behavioral Science, 16, 71-79. https://doi.org/10.1016/j.jcbs.2020.03.001

Study 13012

Shayeghian, Z., Hassanabadi, H., Aguilar-Vafaie, M. E., Amiri, P., & Besharat, M. A. (2016). A randomized controlled trial of acceptance and commitment therapy for type 2 diabetes management: The moderating role of coping styles. PLoS ONE, 11(12), Article e0166599. https://doi.org/10.1371/journal.pone.0166599

Study 13010

Muscara, F., McCarthy, M. C., Rayner, M., Nicholson, J. M., Dimovski, A., McMillan, L., Hearps, S. J. C., Yamada, J., Burke, K., Walser, R., & Anderson, V. A. (2020). Effect of a videoconference-based online group intervention for traumatic stress in parents of children with life-threatening illness: a randomized clinical trial. JAMA Network Open, 3(7), Article e208507. https://doi.org/10.1001/jamanetworkopen.2020.8507

Rayner, M., Muscara, F., Dimovski, A., McCarthy, M. C., Yamada, J., Anderson, V. A., Burke, K., Walser, R., & Nicholson, J. M. (2016). Take a breath: study protocol for a randomized controlled trial of an online group intervention to reduce traumatic stress in parents of children with a life threatening illness or injury. BMC Psychiatry, 16(1), Article 169. https://doi.org/10.1186/s12888-016-0861-2

Study 13008

Puolakanaho, A., Lappalainen, R., Lappalainen, P., Muotka, J. S., Hirvonen, R., Eklund, K. M., Ahonen, T. P. S., & Kiuru, N. (2019). Reducing stress and enhancing academic buoyancy among adolescents using a brief web-based program based on acceptance and commitment therapy: A randomized controlled trial. Journal of Youth and Adolescence, 48(2), 287-305. https://doi.org/10.1007/s10964-018-0973-8

Study 13007

Proctor, B. J., Moghaddam, N. G., Evangelou, N., & das Nair, R. (2018). Telephone-supported acceptance and commitment bibliotherapy for people with multiple sclerosis and psychological distress: A pilot randomised controlled trial. Journal of Contextual Behavioral Science, 9, 103-109. https://doi.org/10.1016/j.jcbs.2018.07.006

Study 13005

Pülschen, S., & Pülschen, D. (2015). Preparation for teacher collaboration in inclusive classrooms-stress reduction for special education students via acceptance and commitment training: A controlled study. Journal of Molecular Psychiatry, 3, Article 8. https://pmc.ncbi.nlm.nih.gov/articles/PMC4587850/

Study 13003

Pearson, A. N., Follette, V. M., & Hayes, S. C. (2012). A pilot study of acceptance and commitment therapy as a workshop intervention for body dissatisfaction and disordered eating attitudes. Cognitive and Behavioral Practice, 19(1), 181-197. https://doi.org/10.1016/j.cbpra.2011.03.001

Study 13001

Pahnke, J., Lundgren, T., Hursti, T., & Hirvikoski, T. (2014). Outcomes of an acceptance and commitment therapy-based skills training group for students with high-functioning autism spectrum disorder: A quasi-experimental pilot study. Autism: The International Journal of Research & Practice, 18(8), 953-964. https://doi.org/10.1177/1362361313501091

Study 12508

Mojtabaie, M. & Asghari, N. (2014). Effectiveness of acceptance and commitment therapy (ACT) to reduce the symptoms of depression in women with breast cancer. Indian Journal of Fundamental and Applied Life Sciences, 4(2), 522-527.

Study 12511

Morin, L., Gregoire, S., & Lachance, L. (2021). Processes of change within acceptance and commitment therapy for university students: Preliminary evidence from a randomized controlled trial. Journal of American College Health, 69, 592-601. https://doi.org/10.1080/07448481.2019.1705828

Study 12512

Mosher, C. E., Secinti, E., Li, R., Hirsh, A. T., Bricker, J., Miller, K. D., Schneider, B., Storniolo, A. M., Mina, L., Newton, E. V., Champion, V. L., & Johns, S. A. (2018). Acceptance and commitment therapy for symptom interference in metastatic breast cancer patients: A pilot randomized trial. Supportive Care in Cancer, 26(6), 1993-2004. https://doi.org/10.1007/s00520-018-4045-0

Study 12513

Nordin, L., & Rorsman, I. (2012). Cognitive behavioural therapy in multiple sclerosis: A randomized controlled pilot study of acceptance and commitment therapy. Journal of Rehabilitation Medicine, 44(1), 87-90. https://doi.org/10.2340/16501977-0898

Study 12515

Petersen, C. L., & Zettle, R. D. (2009). Treating inpatients with comorbid depression and alcohol use disorders: A comparison of acceptance and commitment therapy versus treatment as usual. The Psychological Record, 59(4), 521-536. https://doi.org/10.1007/BF03395679

Study 12540

Thorsell, J., Finnes, A., Dahl, J., Lundgren, T., Gybrant, M., Gordh, T., & Buhrman, M. (2011). A comparative study of 2 manual-based self-help interventions, acceptance and commitment therapy and applied relaxation, for persons with chronic pain. The Clinical Journal of Pain, 27(8), 716-723. https://doi.org/10.1097/AJP.0b013e318219a933

Thorsell, J., Finnes, A., Dahl, J., Lundgren, T., Gybrant, M., Gordh, T., & Buhrman, M. (2013). Erratum: A comparative study of 2 manual-based self-help interventions, acceptance and commitment therapy and applied relaxation, for persons with chronic pain. The Clinical journal of Pain, 29(5), 469. https://doi.org/10.1097/AJP.0b013e31829261d6

Cederberg, J. T., Cernvall, M., Dahl, J., von Essen, L., & Ljungman, G. (2016). Acceptance as a mediator for change in acceptance and commitment therapy for persons with chronic pain. International Journal of Behavioral Medicine, 23, 21-29. https://doi.org/10.1007/s12529-015-9494-y

Study 12518

Räsänen, P., Lappalainen, P., Muotka, J., Tolvanen, A., & Lappalainen, R. (2016). An online guided ACT intervention for enhancing the psychological wellbeing of university students: A randomized controlled clinical trial. Behaviour Research and Therapy, 78, 30-42. https://doi.org/10.1016/j.brat.2016.01.001

Räsänen, P., Muotka, J., & Lappalainen, R. (2020). Examining mediators of change in wellbeing, stress, and depression in a blended, internet-based, ACT intervention for university students. Internet Interventions, 22, Article 100343. https://doi.org/10.1016/j.invent.2020.100343

Study 12522

Rost, A. D., Wilson, K., Buchanan, E., Hildebrandt, M. J., & Mutch, D. (2012). Improving psychological adjustment among late-stage ovarian cancer patients: Examining the role of avoidance in treatment. Cognitive and Behavioral Practice, 19(4), 508-517. https://doi.org/10.1016/j.cbpra.2012.01.003

Study 12524

Saedy, M., Kooshki, S., Jamali Firouzabadi, M., Emamipour, S., & Rezaei Ardani, A. (2015). Effectiveness of acceptance-commitment therapy on anxiety and depression among patients on methadone treatment: A pilot study. Iranian Journal of Psychiatry & Behavioral Sciences, 9(1), 1-7. https://doi.org/10.17795/ijpbs222

Saedy, M., Rezaei Ardani, A., Kooshki, S., Jamali Firouzabadi, M., Emamipour, S., Darabi Mahboub, L., & Mojahedi, M. (2018). Effectiveness of acceptance-commitment therapy on craving beliefs in patients on methadone maintenance therapy: A pilot study. Journal of Rational-Emotional Cognitive Behavioral Therapy, 36, 288-302. https://doi.org/10.1007/s10942-018-0287-5

Study 12532

Shabani, M. J., Mohsenabadi, H., Omidi, A., Lee, E. B., Twohig, M. P., Ahmadvand, A., & Zanjani, Z. (2019). An Iranian study of group acceptance and commitment therapy versus group cognitive behavioral therapy for adolescents with obsessive-compulsive disorder on an optimal dose of selective serotonin reuptake inhibitors. Journal of Obsessive-Compulsive and Related Disorders, 22, Article 100440. https://doi.org/10.1016/j.jocrd.2019.04.003

Study 12535

Shari, N. I., Zainal, N. Z., & Ng, C. G. (2020). Effects of brief acceptance and commitment therapy (ACT) on subjective cognitive impairment in breast cancer patients undergoing chemotherapy. Journal of Psychosocial Oncology, 39(6), 695-714. https://doi.org/10.1080/07347332.2020.1856283

Study 12614

Yadegari, L., Hashemiyan, K., & Abolmaali, K. (2014). Effect of acceptance and commitment therapy on young people with social anxiety. International Journal of Scientific Research in Knowledge, 2(8), 395-403. https://doi.org/10.12983/ijrsk-2014-p0395-0403

Study 12615

Nasiri, A., & Kazemi-Zahrani, H. (2015). The effectiveness of group acceptance and commitment therapy on pain intensity, pain catastrophizing and pain-associated anxiety in patients with chronic pain. Asian Social Science, 11(26), 112-120. https://doi.org/10.5539/ass.v11n26p112

Study 12617

Bayati, A., Abbasi, P., Bashiri, H., Dehghan, F., & Yazdanbakhsh, K. (2017). The effectiveness of acceptance and commitment therapy on psychological well-being in women with MS. The IIOAB Journal, 8(1), 82-86.

Study 12622

Azkhosh, M., Farhoudianm, A., Saadati, H., Shoaee, F., & Lashani, L. (2016). Comparing acceptance and commitment group therapy and 12-steps narcotics anonymous in addict's rehabilitation process: A randomized controlled trial. Iranian Journal of Psychiatry, 11(4), 244-249. https://pmc.ncbi.nlm.nih.gov/articles/PMC5206327/

Study 12623

Bahrami, S., & Asghari, F. (2017). A controlled trial of acceptance and commitment therapy for addiction severity in methamphetamine users: Preliminary study. Archives of Psychiatry & Psychotherapy, 19(2), 49-55. https://doi.org/10.12740/APP/68159

Study 12568

England, E. L., Herbert, J. D., Forman, E. M., Rabin, S. J., Juarascio, A., & Goldstein, S. P. (2012). Acceptance-based exposure therapy for public speaking anxiety. Journal of Contextual Behavioral Science, 1(1-2), 66-72. https://doi.org/10.1016/j.jcbs.2012.07.001

Study 12571

Fathi, R., Khodarahimi, S., & Rasti, A. (2017). The efficacy of acceptance and commitment therapy on metacognitions and anxiety in women outpatients with generalized anxiety disorder in Iran. Canadian Journal of Counselling and Psychotherapy, 51(3), 207-216. https://cjc-rcc.ucalgary.ca/article/view/61155

Study 12572

Fayazbakhsh, E., & Mansouri, A. (2019). Effectiveness of acceptance and commitment therapy on intolerance of uncertainty, experiential avoidance, and symptoms of generalized anxiety disorder in individuals with Type II diabetes. International Archives of Health Sciences, 6(1), 30-35. https://doi.org/10.4103/iahs.iahs_52_18

Study 12573

Fernández, M. D., Luciano, C., & Valdivia-Salas, S. (2012). Impact of acceptance-based nursing intervention on postsurgical recovery: Preliminary findings. The Spanish Journal of Psychology, 15(3), 1361-1370. https://doi.org/10.5209/rev_sjop.2012.v15.n3.39421

Study 12578

Swain, J., Hancock, K., Dixon, A., Koo, S., & Bowman, J. (2013). Acceptance and commitment therapy for anxious children and adolescents: Study protocol for a randomized controlled trial. Trials, 14, Article 140. https://doi.org/10.1186/1745-6215-14-140

Swain, J., Hancock, K., Hainsworth, C., & Bowman, J. (2015). Mechanisms of change: Exploratory outcomes from a randomised controlled trial of acceptance and commitment therapy for anxious adolescents. Journal of Contextual Behavioral Science, 4(1), 56-67. https://doi.org/10.1016/j.jcbs.2014.09.001

Hancock, K., Swain, J., Hainsworth, C., Koo, S., & Dixon, A. (2016). Long term follow up in children with anxiety disorders treated with acceptance and commitment therapy or cognitive behavioral therapy: Outcomes and predictors. Journal of Child and Adolescent Behavior, 4(5), 317-330. https://doi.org/10.4172/2375-4494.1000317

Hancock, K. M., Swain, J., Hainsworth, C. J., Dixon, A. L., Koo, S., & Munro, K. (2018). Acceptance and commitment therapy versus cognitive behavior therapy for children with anxiety: Outcomes of a randomized controlled trial. Journal of Clinical Child & Adolescent Psychology, 47(2), 296-311. https://doi.org/10.1080/15374416.2015.1110822

Study 12579

Harvey, S. T., Henricksen, A., Bimler, D., & Dickson, D. (2017). Addressing anger, stress, and alcohol-related difficulties in the military: An ACT intervention. Military Psychology, 29(5), 464-476. https://doi.org/10.1037/mil0000173

Study 12581

Herbert, J. D., Forman, E. M., Kaye, J. L., Gershkovich, M., Goetter, E., Yuen, E. K., Glassman, L., Goldstein, S., Hitchcock, P., Tronieri, J. S., Berkowitz, S., & Marando-Blanck, S. (2018). Randomized controlled trial of acceptance and commitment therapy versus traditional cognitive behavior therapy for social anxiety disorder: Symptomatic and behavioral outcomes. Journal of Contextual Behavioral Science, 9, 88-96. https://doi.org/10.1016/j.jcbs.2018.07.008

Study 12588

Lanza, P. V., García, P. F., Lamelas, F. R., & González-Menéndez, A. (2014). Acceptance and commitment therapy versus cognitive behavioral therapy in the treatment of substance use disorder with incarcerated women. Journal of Clinical Psychology, 70(7), 644-657. https://doi.org/10.1002/jclp.22060

Study 12589

Lotfifar, B., Ghadampour, E., & Bagheri, N. (2021). Comparative effectiveness of psychotherapy approaches on death anxiety in multiple sclerosis patients. A pilot randomized controlled trial. Multiple Sclerosis and Related Disorders, 51, Article 102914. https://doi.org/10.1016/j.msard.2021.102914

Study 12624

George, B. (2015a). Efficacy of acceptance and mindful based relapse prevention program on emotion regulation difficulty among alcoholics in Kerala India. Journal of Alcoholism and Drug Dependence, 3(3), Article 1000205. doi:10.4172/23296488.1000205

George, B. & de Guzman, R. (2015b). Effectiveness of acceptance and commitment therapy program (ACTP) on perceived stress and emotion regulation among alcoholics in Kerala, India. Indian Journal of Positive Psychology, 6(1), 10-18. https://iahrw.org/our-services/journals/indian-journal-of-positive-psychology/

Study 12592

Mo'tamedi, H., Rezaiemaram, P., & Tavallaie, A. (2012). The effectiveness of a group-based acceptance and commitment additive therapy on rehabilitation of female outpatients with chronic headache: Preliminary findings reducing 3 dimensions of headache impact. Headache: The Journal of Head and Face Pain, 52(7), 1106-1119. https://doi.org/10.1111/j.1526-4610.2012.02192.x

Study 12600

Stefan, S., Cristea, I. A., Szentagotai Tatar, A., & David, D. (2019). Cognitive-behavioral therapy (CBT) for generalized anxiety disorder: Contrasting various CBT approaches in a randomized clinical trial. Journal of Clinical Psychology, 75(7), 1188-1202. https://doi.org/10.1002/jclp.22779

Study 12604

Yadavaia, J. E., Hayes, S. C., & Vilardaga, R. (2014). Using acceptance and commitment therapy to increase self-compassion: A randomized controlled trial. Journal of Contextual Behavioral Science, 3(4), 248-257. https://doi.org/10.1016/j.jcbs.2014.09.002

Study 12607

Zettle, R. D. (2003). Acceptance and commitment therapy (ACT) vs. systematic desensitization in treatment of mathematics anxiety. The Psychological Record, 53(2), 197-215. https://doi.org/10.1007/BF03395440

Study 12608

Shahab, M. (2015). The effect of acceptance and commitment therapy in reducing the anxiety of female teenagers of Tehran City. The International Journal of Indian Psychology, 2(3), 147-151. DOI:10.25215/0203.089, DIP:18.01.089/20150203

Study 12562

Block, J. A., & Wulfert, E. (2000). Acceptance or change: Treating socially anxious college students with ACT or CBGT. The Behavior Analyst Today, 1(2), 3-10. https://doi.org/10.1037/h0099879

Study 12431

Arch, J. J., Wolitzky-Taylor, K. B., Eifert, G. H., & Craske, M. G. (2012). Longitudinal treatment mediation of traditional cognitive behavioral therapy and acceptance and commitment therapy for anxiety disorders. Behaviour Research & Therapy, 50(7-8), 469-478. https://doi.org/10.1016/j.brat.2012.04.007

Arch, J. J., Eifert, G. H., Davies, C., Plumb Vilardaga, J. C., Rose, R. D., & Craske, M. G. (2012b). Randomized clinical trial of cognitive behavioral therapy (CBT) versus acceptance and commitment therapy (ACT) for mixed anxiety disorders. Journal of Consulting and Clinical Psychology, 80(5), 750-765. https://doi.org/10.1037/a0028310

Study 12552

Zemestani, M., & Mozaffari, S. (2020). Acceptance and commitment therapy for the treatment of depression in persons with physical disability: A randomized controlled trial. Clinical Rehabilitation, 34(7), 938-947. https://doi.org/10.1177/0269215520923135

Study 12548

White, R., Gumley, A., McTaggart, J., Rattrie, L., McConville, D., Cleare, S., & Mitchell, G. (2011). A feasibility study of acceptance and commitment therapy for emotional dysfunction following psychosis. Behaviour Research and Therapy, 49(12), 901-907. https://doi.org/10.1016/j.brat.2011.09.003

White, R. G., Gumley, A. I., McTaggart, J., Rattrie, L., McConville, D., Cleare, S., McLeod, H. J., & Mitchell, G. (2015). Acceptance and commitment therapy for depression following psychosis: An examination of clinically significant change. Journal of Contextual Behavioral Science, 4(3), 203-209. https://doi.org/10.1016/j.jcbs.2015.06.004

Study 12625

Ghaleh Emamghaisi, Z., & Atashpour, S. H. (2020). Effectiveness of acceptance and commitment therapy on self-criticism and feeling of shame in methamphetamine users. Journal of Substance Use, 25(4), 372-376. https://doi.org/10.1080/14659891.2019.1704082

Study 12627

Gul, M., & Aqeel, M. (2021). Acceptance and commitment therapy for treatment of stigma and shame in substance use disorders: A double-blind, parallel-group, randomized controlled trial. Journal of Substance Use, 26(4), 413-319. https://doi.org/10.1080/14659891.2020.1846803

Study 12629

Hayes, S. C., Wilson, K. G., Gifford, E. V., Bissett, R., Piasecki, M., Batten, S. V., Byrd, M., & Gregg, J. (2004). A preliminary trial of twelve-step facilitation and acceptance and commitment therapy with polysubstance-abusing methadone-maintained opiate addicts. Behavior Therapy, 35(4), 667-688. https://doi.org/10.1016/S0005-7894(04)80014-5

Study 12635

Smout, M. F., Longo, M., Harrison, S., Minniti, R., Wickes, W., & White, J. M. (2010). Psychosocial treatment for methamphetamine use disorders: A preliminary randomized controlled trial of cognitive behavior therapy and acceptance and commitment therapy. Substance Abuse, 31(2), 98-107. https://doi.org/10.1080/08897071003641578

Study 12709

Shawyer, F., Farhall, J., Thomas, N., Hayes, S. C., Gallop, R., Copolov, D., & Castle, D. J. (2017). Acceptance and commitment therapy for psychosis: Randomised controlled trial. The British Journal of Psychiatry, 210(2), 140-148. https://doi.org/10.1192/bjp.bp.116.182865

Thomas, N., Shawyer, F., Castle, D. J., Copolov, D., Hayes, S. C., & Farhall, J. (2014). A randomised controlled trial of acceptance and commitment therapy (ACT) for psychosis: Study protocol. BMC Psychiatry, 14, Article 198. https://doi.org/10.1186/1471-244X-14-198

Study 12564

Craske, M. G., Niles, A. N., Burklund, L. J., Wolitzky-Taylor, K. B., Vilardaga, J. C. P., Arch, J. J., Saxbe, D. E., & Lieberman, M. D. (2014). Randomized controlled trial of cognitive behavioral therapy and acceptance and commitment therapy for social phobia: Outcomes and moderators. Journal of Consulting and Clinical Psychology, 82(6), 1034-1048. https://doi.org/10.1037/a0037212

Niles, A. N., Burklund, L. J., Arch, J. J., Lieberman, M. D., Saxbe, D., & Craske, M. G. (2014). Cognitive mediators of treatment for social anxiety disorder: Comparing acceptance and commitment therapy and cognitive-behavioral therapy. Behavior Therapy, 45(5), 664-677. https://doi.org/10.1016/j.beth.2014.04.006

Burklund, L. J., Torre, J. B., Lieberman, M. D., Taylor, S. E., & Craske, M. G. (2017). Neural responses to social threat and predictors of cognitive behavioral therapy and acceptance and commitment therapy in social anxiety disorder. Psychiatry Research: Neuroimaging, 261, 52-64. https://doi.org/10.1016/j.pscychresns.2016.12.012

Mesri, B., Niles, A. N., Pittig, A., LeBeau, R. T., Haik, E., & Craske, M. G. (2017). Public speaking avoidance as a treatment moderator for social anxiety disorder. Journal of Behavior Therapy and Experimental Psychiatry, 55, 66-72. https://doi.org/10.1016/j.jbtep.2016.11.010

Young, K. S., Burklund, L. J., Torre, J. B., Saxbe, D., Lieberman, M. D., & Craske, M. G. (2017). Treatment for social anxiety disorder alters functional connectivity in emotion regulation neural circuitry. Psychiatry Research: Neuroimaging, 261, 44-51. https://doi.org/10.1016/j.pscychresns.2017.01.005

Brown, L. A., Young, K. S., Goldin, P. R., Torre, J. B., Burklund, L. J., Davies, C. D., Niles, A. N., Lieberman, M. D., Saxbe, D. E., & Craske, M. G. (2019). Self-referential processing during observation of a speech performance task in social anxiety disorder from pre-to post-treatment: Evidence of disrupted neural activation. Psychiatry Research: Neuroimaging, 284, 13-20. https://doi.org/10.1016/j.pscychresns.2018.12.017

Sewart, A. R., Niles, A. N., Burklund, L. J., Saxbe, D. E., Lieberman, M. D., & Craske, M. G. (2019). Examining positive and negative affect as outcomes and moderators of cognitive-behavioral therapy and acceptance and commitment therapy for social anxiety disorder. Behavior Therapy, 50(6), 1112-1124. https://doi.org/10.1016/j.beth.2019.07.001

Young, K. S., LeBeau, R. T., Niles, A. N., Hsu, K. J., Burklund, L. J., Mesri, B., Saxbe, D., Lieberman, M. D., & Craske, M. G. (2019). Neural connectivity during affect labeling predicts treatment response to psychological therapies for social anxiety disorder. Journal of Affective Disorders, 242, 105-110. https://doi.org/10.1016/j.jad.2018.08.016

Study 12567

Eilenberg, T., Frostholm, L., Schröder, A., Jensen, J. S., & Fink, P. (2015). Long-term consequences of severe health anxiety on sick leave in treated and untreated patients: Analysis alongside a randomised controlled trial. Journal of Anxiety Disorders, 32, 95-102. https://doi.org/10.1016/j.janxdis.2015.04.001

Eilenberg, T., Fink, P., Jensen, J. S., Rief, W., & Frostholm, L. (2016). Acceptance and commitment group therapy (ACT-G) for health anxiety: A randomized controlled trial. Psychological Medicine, 46(1), 103-115. https://doi.org/10.1017/S0033291715001579

Eilenberg, T., Fink, P., Ørnbøl, E., Jensen, J. S., Rief, W., Hoffmann, D., & Frostholm, L. (2017). Acceptance and commitment group therapy for severe health anxiety: Efficacy and intervening variables. Result from a randomized controlled trial. Journal of Psychosomatic Research, 97, 147. https://doi.org/10.1016/j.jpsychores.2017.03.234

Eilenberg, T., Hoffmann, D., Jensen, J. S., & Frostholm, L. (2017). Intervening variables in group-based acceptance & commitment therapy for severe health anxiety. Behaviour Research and Therapy, 92, 24-31. https://doi.org/10.1016/j.brat.2017.01.009

Study 12951

Bond, F. W., & Bunce, D. (2000). Mediators of change in emotion-focused and problem-focused worksite stress management interventions. Journal of Occupational Health Psychology, 5(1), 156-163. https://doi.org/10.1037//1076-8998.5.1.156

Study 12647

Sander, A. M., Clark, A. N., Arciniegas, D. B., Tran, K., Leon-Novelo, L., Ngan, E., Bogaards, J., Sherer, M., & Walser, R. (2021). A randomized controlled trial of acceptance and commitment therapy for psychological distress among persons with traumatic brain injury. Neuropsychological Rehabilitation, 31(7), 1105-1129. https://doi.org/10.1080/09602011.2020.1762670

Study 12659

Sadri Damirchi, E., Esmaeili Ghazivaoloii, F., Fathi, D., Mehraban, S., & Ahmadboukani, S. (2019). Effectiveness of group psychotherapy based on admission and commitment to body dysmorphic obsessive-compulsive disorder in women with breast cancer. The Iranian Rehabilitation Journal, 17(4), 351-358. https://doi.org/10.32598/irj.17.4.351

Study 12977

Kaboudi, M., Dehghan, F., & Ziapour, A. (2017). The effect of acceptance and commitment therapy on the mental health of women patients with type II diabetes. Annals of Tropical Medicine and Public Health, 10(6), 1709-1713. https://doi.org/10.4103/ATMPH.ATMPH_607_17

Study 12990

Martz, E., Chesney, M. A., Livneh, H., Jelleberg, C., Fuller, B., & Henry, J. A. (2018). A pilot randomized clinical trial comparing three brief group interventions for individuals with tinnitus. Global Advances in Health and Medicine, 7, Article 2164956118783659. https://doi.org/10.1177/2164956118783659

Study 12539

Thekiso, T. B., Murphy, P., Milnes, J., Lambe, K., Curtin, A., & Farren, C. K. (2015). Acceptance and commitment therapy in the treatment of alcohol use disorder and comorbid affective disorder: A pilot matched control trial. Behavior Therapy, 46(6), 717-728. https://doi.org/10.1016/j.beth.2015.05.005

Study 12543

Twohig, M. P., Vilardaga, J. C. P., Levin, M. E., & Hayes, S. C. (2015). Changes in psychological flexibility during acceptance and commitment therapy for obsessive compulsive disorder. Journal of Contextual Behavioral Science, 4(3), 196-202. https://doi.org/10.1016/j.jcbs.2015.07.001

Twohig, M. P., Hayes, S. C., Plumb, J. C., Pruitt, L. D., Collins, A. B., Hazlett-Stevens, H., & Woidneck, M. R. (2010). A randomized clinical trial of acceptance and commitment therapy versus progressive relaxation training for obsessive-compulsive disorder. Journal of Consulting and Clinical Psychology, 78(5), 705-716. https://doi.org/10.1037/a0020508

Study 12549

Whiting, D., Deane, F., McLeod, H., Ciarrochi, J., & Simpson, G. (2019). Can acceptance and commitment therapy facilitate psychological adjustment after a severe traumatic brain injury? A pilot randomized controlled trial. Neuropsychological Rehabilitation, 30(7), 1348-1371. https://doi.org/10.1080/09602011.2019.1583582

Whiting, D. L., Simpson, G. K., McLeod, H. J., Deane, F. P., & Ciarrochi, J. (2012). Acceptance and commitment therapy (ACT) for psychological adjustment after traumatic brain injury: Reporting the protocol for a randomised controlled trial. Brain Impairment, 13(3), 360-376. https://doi.org/10.1017/BrImp.2012.28

Study 12551

Wynne, B., McHugh, L., Gao, W., Keegan, D., Byrne, K., Rowan, C., Hartery, K., Kirschbaum, C., Doherty, G., Cullen, G., Dooley, B., & Mulcahy, H. E. (2019). Acceptance and commitment therapy reduces psychological stress in patients with inflammatory bowel diseases. Gastroenterology, 156(4), 935-945. https://doi.org/10.1053/j.gastro.2018.11.030

Study 12673

Givehki, R., Afshar, H., Goli, F., Scheidt, C. E., Omidi, A., & Davoudi, M. (2018). Effect of acceptance and commitment therapy on body image flexibility and body awareness in patients with psychosomatic disorders: A randomized clinical trial. Electronic Physician, 10(7), 7008-7016. https://doi.org/10.19082/7008

Khesmakhi, S. S., Zanjani, H. A., Goli, F., Omidi, A., Scheidt, C. E., & Givehki, R. (2019). Effectiveness of acceptance and commitment therapy on psychosomatic symptoms and mindfulness in patients with psychosomatic disorder. Journal of Practice in Clinical Psychology, 7(2), 79-86. https://api.semanticscholar.org/CorpusID:196700962

Study 12674

Gloster, A. T., Sonntag, R., Hoyer, J., Meyer, A. H., Heinze, S., Ströhle, A., Eifert, G., & Wittchen, H.-U. (2015). Treating treatment-resistant patients with panic disorder and agoraphobia using psychotherapy: A randomized controlled switching trial. Psychotherapy and Psychosomatics, 84(2), 100-109. https://doi.org/10.1159/000370162

Gloster, A. T., Klotsche, J., Ciarrochi, J., Eifert, G., Sonntag, R., Wittchen, H.-U., & Hoyer, J. (2017). Increasing valued behaviors precedes reduction in suffering: Findings from a randomized controlled trial using ACT. Behaviour Research and Therapy, 91, 64-71. https://doi.org/10.1016/j.brat.2017.01.013

Wersebe, H., Lieb, R., Meyer, A. H., Hoyer, J., Wittchen, H.-U., & Gloster, A. T. (2017). Changes of valued behaviors and functioning during an acceptance and commitment therapy intervention. Journal of Contextual Behavioral Science, 6(1), 63-70. https://doi.org/10.1016/j.jcbs.2016.11.005

Study 12676

Grégoire, S., Lachance, L., Bouffard, T., & Dionne, F. (2018). The use of acceptance and commitment therapy to promote mental health and school engagement in university students: A multisite randomized controlled trial. Behavior Therapy, 49(3), 360-372. https://doi.org/10.1016/j.beth.2017.10.003

Study 12678

Han, J., Liu, J.-E., Su, Y.-L., & Qiu, H. (2019). Effect of a group-based acceptance and commitment therapy (ACT) intervention on illness cognition in breast cancer patients. Journal of Contextual Behavioral Science, 14, 73-81. https://doi.org/10.1016/j.jcbs.2019.09.003

Study 12682

Jolley, S., Johns, L. C., O'Donoghue, E., Oliver, J., Khondoker, M., Byrne, M., Butler, L., De Rosa, C., Leal, D., McGovern, J., Rasiukeviciute, B., Sim, F., & Morris, E. (2020). Group acceptance and commitment therapy for patients and caregivers in psychosis services: Feasibility of training and a preliminary randomized controlled evaluation. British Journal of Clinical Psychology, 59(4), 524-551. https://doi.org/10.1111/bjc.12265

Study 12684

Krafft, J., Potts, S., Schoendorff, B., & Levin, M. E. (2019). A randomized controlled trial of multiple versions of an acceptance and commitment therapy matrix app for well-being. Behavior Modification, 43(2), 246-272. https://doi.org/10.1177/0145445517748561

Study 12686

Lee, E. B., Haeger, J. A., Levin, M. E., Ong, C. W., & Twohig, M. P. (2018). Telepsychotherapy for trichotillomania: A randomized controlled trial of ACT enhanced behavior therapy. Journal of Obsessive-Compulsive and Related Disorders, 18, 106-115. https://doi.org/10.1016/j.jocrd.2018.04.003

Study 12661

Deval, C., Bernard-Curie, S., & Monestès, J.-L. (2017). Effects of an acceptance and commitment therapy intervention on leaders' and managers' psychological flexibility. Journal de Thérapie Comportementale et Cognitive, 27(1), 34-42. https://doi.org/10.1016/j.jtcc.2016.10.002

Study 12687

Lee, E. B., Homan, K. J., Morrison, K. L., Ong, C. W., Levin, M. E., & Twohig, M. P. (2020). Acceptance and commitment therapy for trichotillomania: A randomized controlled trial of adults and adolescents. Behavior Modification, 44(1), 70-91. https://doi.org/10.1177/0145445518794366

Study 12690

Lillis, J., Hayes, S. C., Bunting, K., & Masuda, A. (2009). Teaching acceptance and mindfulness to improve the lives of the obese: A preliminary test of a theoretical model. Annals of Behavioral Medicine, 37(1), 58-69. https://doi.org/10.1007/s12160-009-9083-x

Lillis, J., Hayes, S. C., & Levin, M. E. (2011). Binge eating and weight control: The role of experiential avoidance. Behavior Modification, 35(3), 252-264. https://doi.org/10.1177/0145445510397178

Study 12663

El Ashry, A. M., Abd El Dayem, S. M., & Ramadan, F. H. (2021). Effect of applying "acceptance and commitment therapy" on auditory hallucinations among patients with schizophrenia. Archives of Psychiatric Nursing, 35(2), 141-152. https://doi.org/10.1016/j.apnu.2021.01.003

Study 12693

Moyer, D. N., Page, A. R., McMakin, D. Q., Murrell, A. R., Lester, E. G., & Walker, H. A. (2018). The impact of acceptance and commitment therapy on positive parenting strategies among parents who have experienced relationship violence. Journal of Family Violence, 33, 269-279. https://doi.org/10.1007/s10896-018-9956-5

Boals, A., & Murrell, A. R. (2016). I am > trauma: Experimentally reducing event centrality and PTSD symptoms in a clinical trial. Journal of Loss and Trauma, 21(6), 471-483. https://doi.org/10.1080/15325024.2015.1117930

Study 12664

Enoch, M. R., & Dixon, M. R. (2019). Neuro-typical children outcomes from an acceptance and commitment therapy summer camp. Behavior Analysis in Practice, 12, 343-352. https://doi.org/10.1007/s40617-018-00319-0

Study 12696

Ong, C. W., Lee, E. B., Krafft, J., Terry, C. L., Barrett, T. S., Levin, M. E., & Twohig, M. P. (2019). A randomized controlled trial of acceptance and commitment therapy for clinical perfectionism. Journal of Obsessive-Compulsive and Related Disorders, 22, Article 100444. https://doi.org/10.1016/j.jocrd.2019.100444

Ong, C. W., Barney, J. L., Barrett, T. S., Lee, E. B., Levin, M. E., & Twohig, M. P. (2019). The role of psychological inflexibility and self-compassion in acceptance and commitment therapy for clinical perfectionism. Journal of Contextual Behavioral Science, 13, 7-16. https://doi.org/10.1016/j.jcbs.2019.06.005

Ong, C. W., Hancock, A. S., Barrett, T. S., Lee, E. B., Wan, N., Gillam, R. B., Levin, M. E., & Twohig, M. P. (2020). A preliminary investigation of the effect of acceptance and commitment therapy on neural activation in clinical perfectionism. Journal of Contextual Behavioral Science, 18, 152-161. https://doi.org/10.1016/j.jcbs.2020.09.007

Study 12665

Esfahani, M., Kjbaf, M. B., & Abedi, M. R. (2015). Evaluation and comparison of the effects of time perspective therapy, acceptance and commitment therapy and narrative therapy on severity of symptoms of obsessive-compulsive disorder. Journal of the Indian Academy of Applied Psychology, 41(3), 148-155. https://jiaap.in/evaluation-and-comparison-of-the-effects-of-time-perspective-therapy-acceptance-and-commitment-therapy-and-narrative-therapy-on-severity-of-symptoms-of-obsessive-compulsive-disorder/

Study 12703

Rohani, F., Rasouli-Azad, M., Twohig, M. P., Ghoreishi, F. S., Lee, E. B., & Akbari, H. (2018). Preliminary test of group acceptance and commitment therapy on obsessive-compulsive disorder for patients on optimal dose of selective serotonin reuptake inhibitors. Journal of Obsessive-Compulsive and Related Disorders, 16, 8-13. https://doi.org/10.1016/j.jocrd.2017.10.002

Study 12704

Rostami, R., & Bozorgi, Z. D. (2019). Effectiveness of acceptance and commitment therapy on resiliency and alexithymia of somatic symptoms. Journal of Practice in Clinical Psychology, 7(2), 87-94. https://doi.org/10.32598/jpcp.7.2.87

Study 12705

Sahebari, M., Asghari Ebrahimabad, M. J., Ahmadi Shoraketokanlo, A., Aghamohammadian Sharbaf, H., & Khodashahi, M. (2019). Efficacy of acceptance and commitment therapy in reducing disappointment, psychological distress, and psychasthenia among systemic lupus erythematosus (SLE) patients. Iranian Journal of Psychiatry, 14(2), 130-136. https://doi.org/10.18502/ijps.v14i2.992

Study 12710

Mahmoudi Souran, H., Sanagouyemoharer, G. R., & Shirazi, M. (2019). Acceptance and commitment therapy improves psychological flexibility of students with thalassemia major: A randomized controlled trial. Journal of Practice in Clinical Psychology, 7(2), 107-116. http://dx.doi.org/10.32598/jpcp.7.2.107

Study 12712

Stafford-Brown, J., & Pakenham, K. I. (2012). The effectiveness of an ACT informed intervention for managing stress and improving therapist qualities in clinical psychology trainees. Journal of Clinical Psychology, 68(6), 592-513. https://doi.org/10.1002/jclp.21844

Study 12465

Forman, E. M., Shaw, J. A., Goetter, E. M., Herbert, J. D., Park, J. A., & Yuen, E. K. (2012). Long-term follow-up of a randomized controlled trial comparing acceptance and commitment therapy and standard cognitive behavioral therapy for anxiety and depression. Behavior Therapy, 43(4): 801-811. https://doi.org/10.1016/j.beth.2012.04.004

Forman, E. M., Herbert, J. D., Moitra, E., Yeomans, P. D., & Geller, P. A. (2007). A randomized controlled effectiveness trial of acceptance and commitment therapy and cognitive therapy for anxiety and depression. Behavior Modification, 31(6), 772-799. https://doi.org/10.1177/0145445507302202

Forman, E. M., Chapman, J. E., Herbert, J. D., Goetter, E. M., Yuen, E. K., & Moitra, E. (2012). Using session-by-session measurement to compare mechanisms of action for acceptance and commitment therapy and cognitive therapy. Behavior Therapy, 43(2), 341-354. https:/doi.org/10.1016/j.beth.2011.07.004

Forman, E. M., Shaw, J. A., Goetter, E. M., Herbert, J. D., Park, J. A., & Yuen, E. K. (2012). Long-term follow-up of a randomized controlled trial comparing acceptance and commitment therapy and standard cognitive behavioral therapy for anxiety and depression. Behavior Therapy, 43(4): 801-811. https://doi.org/10.1016/j.beth.2012.04.004

Study 12528

Samaan, M., Diefenbacher, A., Schade, C., Dambacher, C., Pontow, I.-M., Pakenham, K., & Fydrich, T. (2021). A clinical effectiveness trial comparing ACT and CBT for inpatients with depressive and mixed mental disorders. Psychotherapy Research, 31(3), 372-385. https://doi.org/10.1080/10503307.2020.1802080

Study 12626

González-Menéndez, A., Fernández, P., Rodríguez, F., & Villagrá, P. (2014). Long-term outcomes of acceptance and commitment therapy in drug-dependent female inmates: A randomized controlled trial. International Journal of Clinical Health and Psychology, 14(1), 18-27. https://doi.org/10.1016/S1697-2600(14)70033-X

Study 12650

Bach, P., & Hayes, S. C. (2002). The use of acceptance and commitment therapy to prevent the rehospitalization of psychotic patients: A randomized controlled trial. Journal of Consulting and Clinical Psychology, 70(5), 1129-1139. https://doi.org/10.1037/0022-006X.70.5.1129

Bach, P., Hayes, S. C., & Gallop, R. (2012). Long-term effects of brief acceptance and commitment therapy for psychosis. Behavior Modification, 36(2), 165-181. https://doi.org/10.1177/0145445511427193

Bach, P., Gaudiano, B. A., Hayes, S. C., & Herbert, J. D. (2013). Acceptance and commitment therapy for psychosis: Intent to treat, hospitalization outcome and mediation by believability. Psychosis, 5(2), 166-174. https://doi.org/10.1080/17522439.2012.671349

Study 12667

Fang, S., & Ding, D. (2020). The efficacy of group-based acceptance and commitment therapy on psychological capital and school engagement: A pilot study among Chinese adolescents. Journal of Contextual Behavioral Science, 16, 134-143. https://doi.org/10.1016/j.jcbs.2020.04.005

Study 12700

Pleger, M., Treppner, K., Diefenbacher, A., Schade, C., Dambacher, C., & Fydrich, T. (2018). Effectiveness of acceptance and commitment therapy compared to CBT+: Preliminary results. The European Journal of Psychiatry, 32(4), 166-173. https://doi.org/10.1016/j.ejpsy.2018.03.003

Study 12702

Reyes-Ortega, M. A., Miranda, E. M., Fresán, A., Vargas, A. N., Barragán, S. C., Robles García, R. R., & Arango, I. (2020). Clinical efficacy of a combined acceptance and commitment therapy, dialectical behavioural therapy, and functional analytic psychotherapy intervention in patients with borderline personality disorder. Psychology & Psychotherapy: Theory, Research and Practice, 93(3), 474-489. https://doi.org/10.1111/papt.12240

Study 12713

Twohig, M. P., Whittal, M. L., Cox, J. M., & Gunter, R. (2010). An initial investigation into the process of change in ACT, CT, and ERP for OCD. International Journal of Behavioral Consultation and Therapy, 6(1), 67-83. https://doi.org/10.1037/h0100898

Study 12636

Stotts, A. L., Green, C., Masuda, A., Grabowski, J., Wilson, K., Northrup, T. F., Moeller, F. G., & Schmitz, J. M. (2012). A stage I pilot study of acceptance and commitment therapy for methadone detoxification. Drug and Alcohol Dependence, 125(3), 215-222. https://doi.org/10.1016/j.drugalcdep.2012.02.015

Study 12719

Vakili, Y., Gharraee, B., Habibi, M., Lavasani, F., & Rasoolian, M. (2014). The comparison of acceptance and commitment therapy with selective serotonin reuptake inhibitors in the treatment of obsessive-compulsive disorder. Zahedan Journal of Research in Medical Sciences, 16, 10-14. https://api.semanticscholar.org/CorpusID:73320143

Vakili, Y., Gharaee, B., & Habibi, M. (2015). Acceptance and commitment therapy, selective serotonin reuptake inhibitors and their combination in the obsessive-compulsive symptoms and experiential avoidance in patients with obsessive-compulsive disorder. Iranian Journal of Psychiatry and Behavioral Sciences, 9(2): Article e845. https://doi.org/10.17795/ijpbs845

Study 13115

Zarling, A., Bannon, S., & Berta, M. (2019). Evaluation of acceptance and commitment therapy for domestic violence offenders. Psychology of Violence, 9(3), 257-266. https://doi.org/10.1037/vio0000097

Study 13421

El Rafihi-Ferreira, R., Morin, C. M., Toscanini, A. C., Lotufo Neto, F., Brasil, I. S., Gallinaro, J. G., Borges, D. S., Conway, S. G., & Hasan, R. (2020). Acceptance and commitment therapy-based behavioral intervention for insomnia: A pilot randomized controlled trial. Brazilian Journal of Psychiatry, 43(5): 504-509. https://doi.org/10.1590/1516-4446-2020-0947

Study 12716

Twohig, M. P., Petersen, J. M., Fruge, J., Ong, C. W., Barney, J. L., Krafft, J., Lee, E. B., & Levin, M. E. (2021). A pilot randomized controlled trial of online-delivered ACT-enhanced behavior therapy for trichotillomania in adolescents. Cognitive and Behavioral Practice, 28(4), 653-668. https://doi.org/10.1016/j.cbpra.2021.01.004

Study 12717

Tyrberg, M. J., Carlbring, P., & Lundgren, T. (2017). Brief acceptance and commitment therapy for psychotic inpatients: A randomized controlled feasibility trial in Sweden. Nordic Psychology, 69(2), 110-125. https://doi.org/10.1080/19012276.2016.1198271

Study 12721

Waters, C. S., Frude, N., Flaxman, P. E., & Boyd, J. (2018). Acceptance and commitment therapy (ACT) for clinically distressed health care workers: Waitlist-controlled evaluation of an ACT workshop in a routine practice setting. British Journal of Clinical Psychology, 57(1), 82-98. https://doi.org/10.1111/bjc.12155

Study 12723

Yazdanbakhsh, K., Kaboudi, M., Roghanchi, M., Dehghan, F., & Nooripour, R. (2016). The effectiveness of acceptance and commitment therapy on psychological adaptation in women with MS. Journal of Fundamental and Applied Sciences, 8(3S), 2767-2777. https://api.semanticscholar.org/CorpusID:152086461

Study 12724

Zemestani, M., Salavati, M., Seyedolshohadayi, A., Petersen, J. M., Ong, C. W., Twohig, M. P., & Ghaderi, E. (2020). A preliminary examination of acceptance and commitment therapy versus exposure and response prevention for patients with obsessive-compulsive disorder on an optimal dose of SSRIs: A randomized controlled trial in Iran. Behavior Modification, 46(3), 553-580. https://doi.org/10.1177/0145445520982977

Study 12944

Mohammadi, M., Farhoudian, A., Shoaee, F., Younesi, S. J., & Dolatshahi, B. (2015). Aggression in juvenile delinquents and mental rehabilitation group therapy based on acceptance and commitment. Iranian Rehabilitation Journal, 13(2), 5-9. https://api.semanticscholar.org/CorpusID:53515943

Study 12947

Zarling, A., Lawrence, E., & Marchman, J. (2015). A randomized controlled trial of acceptance and commitment therapy for aggressive behavior. Journal of Consulting and Clinical Psychology, 83(1), 199-212. https://doi.org/10.1037/a0037946

Study 12952

Brinkborg, H., Michanek, J., Hesser, H., & Berglund, G. (2011). Acceptance and commitment therapy for the treatment of stress among social workers: A randomized controlled trial. Behaviour Research and Therapy, 49(6-7), 389-398. https://doi.org/10.1016/j.brat.2011.03.009

Study 12956

Dahl, J., Wilson, K. G., & Nilsson, A. (2004). Acceptance and commitment therapy and the treatment of persons at risk for long-term disability resulting from stress and pain symptoms: A preliminary randomized trial. Behavior Therapy, 35(4), 785-801. https://doi.org/10.1016/S0005-7894(04)80020-0

Study 12965

Gloster, A. T., Klotsche, J., Aggeler, T., Geisser, N., Juillerat, G., Schmidlin, N., Müller-Siemens, S., & Gaab, J. (2019). Psychoneuroendocrine evaluation of an acceptance and commitment based stress management training. Psychotherapy Research, 29(4), 503-513. https://doi.org/10.1080/10503307.2017.1380862

Study 12971

Hosseinpanahi, M., Mirghafourvand, M., Farshbaf-Khalili, A., Esmaeilpour, K., Rezaei, M., & Malakouti, J. (2020). The effect of counseling based on acceptance and commitment therapy on mental health and quality of life among infertile couples: A randomized controlled trial. Journal of Education and Health Promotion, 9(1), Article 251. https://doi.org/10.4103/jehp.jehp_512_20

Study 12972

Ishola, A. G., & Chipps, J. (2015). The use of mobile phones to deliver acceptance and commitment therapy in the prevention of mother-child HIV transmission in Nigeria. Journal of Telemedicine and Telecare, 21(8), 423-426. https://doi.org/10.1177/1357633X15605408

Study 12987

Mahmoudpour, A., Rayesh, N., Ghanbarian, E., & Rezaee, M. (2021). Effectiveness of acceptance and commitment therapy (ACT) on emotional regulation and loneliness of divorced women in Iran. Journal of Marital and Family Therapy, 47(4), 831-842. https://doi.org/10.1111/jmft.12492

Study 12991

Martz, E., Chesney, M. A., Livneh, H., Ungar, O. J., Harel, S., Terracini, D., & Oron, Y. (2020). Two brief group interventions for individuals with tinnitus in Israel. International Journal of Therapy and Rehabilitation, 27(9), Article 0058. https://doi.org/10.12968/ijtr.2019.0058

Study 12993

McConachie, D. A. J., McKenzie, K., Morris, P. G., & Walley, R. M. (2014). Acceptance and mindfulness-based stress management for support staff caring for individuals with intellectual disabilities. Research in Developmental Disabilities, 35(6), 1216-1227. https://doi.org/10.1016/j.ridd.2014.03.005

Study 12994

Chowdhary, M., & Jahan, M. (2014). Reducing internalized stigma of mental illness among patients with schizophrenia using acceptance and commitment therapy. Indian Journal of Clinical Psychology, 41(2), 94-101. https://ijcp.co.in/wp-content/uploads/2022/01/2014fb.pdf

Study 12998

Niles, A. N., Mesri, B., Burklund, L. J., Lieberman, M. D., & Craske, M. G. (2013). Attentional bias and emotional reactivity as predictors and moderators of behavioral treatment for social phobia. Behaviour Research and Therapy, 51(10), 669-679. https://doi.org/10.1016/j.brat.2013.06.005

Studies Not Eligible for Review

Study 12963

Fung, K., Liu, J. J. W., Sin, R., Shakya, Y., Guruge, S., Bender, A., & Wong, J. P. (2021). Examining different strategies for stigma reduction and mental health promotion in Asian men in Toronto. Community Mental Health Journal, 57, 655-666. https://doi.org/10.1007/s10597-020-00723-3

Guruge, S., Fung, K. P.-L., Sidani, S., Este, D., Morrow, M., McKenzie, K., Wong, J. P.-H. (2018). Study protocol: Mobilizing Asian men in Canada to reduce stigma of mental illness. Contemporary Clinical Trials, 71, 133–139. https://doi.org/10.1016/j.cct.2018.06.009.

Fung, K. P-L., Liu, J. J. W., Sin, R., Bender, A., Shakya, Y., Butt, N., Wong, J. P-H. (2022). Exploring mental illness stigma among Asian men mobilized to become community mental health ambassadors in Toronto Canada. Ethnicity and Health, 27(1), 100–118. https://doi.org/10.1080/13557858.2019.1640350

This study is ineligible for review because it does not report program or service impacts on an eligible outcome (Handbook Version 2.0, Section 4.1.8)

Study 13515

Wicksell, R. K., Olsson, G. L., & Hayes, S. C. (2011). Mediators of change in acceptance and commitment therapy for pediatric chronic pain. Pain, 152(12), 2792-2801. https://doi.org/10.1016/j.pain.2011.09.003

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13441

Hoefnagels, J. W., Fischer, K., Bos, R. A. T., Driessens, M. H. E., Meijer, S. L. A., Schutgens, R. E. G., & Schrijvers, L. H. (2020). A feasibility study on two tailored interventions to improve adherence in adults with haemophilia. Pilot and Feasibility Studies, 6, Article 189. https://doi.org/10.1186/s40814-020-00723-w

This study is ineligible for review because it is not a study of the program or service under review (Handbook Version 2.0, Section 4.1.9)

Study 13094

Kenny, A., & Bizumic, B. (2016). Learn and ACT: Changing prejudice towards people with mental illness using stigma reduction interventions. Journal of Contextual Behavioral Science, 5(3), 178-185. https://doi.org/10.1016/j.jcbs.2016.06.004

This study is ineligible for review because it is not a study of the program or service under review (Handbook Version 2.0, Section 4.1.9)

Study 13089

Juarascio, A. S., Forman, E. M., & Herbert, J. D. (2010). Acceptance and commitment therapy versus cognitive therapy for the treatment of comorbid eating pathology. Behavior Modification, 34(2), 175-190. https://doi.org/10.1177/0145445510363472

This study is ineligible for review because it is not a study of the program or service under review (Handbook Version 2.0, Section 4.1.9)

Study 13014

Swain, N., & Bodkin-Allen, S. (2017). Developing singing confidence in early childhood teachers using acceptance and commitment therapy and group singing: A randomized trial. Research Studies in Music Education, 39(1), 109-120. https://doi.org/10.1177/1321103X17700141

This study is ineligible for review because it does not report program or service impacts on an eligible outcome (Handbook Version 2.0, Section 4.1.8)

Study 12992

Masuda, A., Hayes, S. C., Fletcher, L. B., Seignourel, P. J., Bunting, K., Herbst, S. A., Twohig, M. P., & Lillis, J. (2007). Impact of acceptance and commitment therapy versus education on stigma toward people with psychological disorders. Behaviour Research and Therapy, 45(11), 2764-2772. https://doi.org/10.1016/j.brat.2007.05.008

This study is ineligible for review because it is not a study of the program or service under review (Handbook Version 2.0, Section 4.1.9)

Study 12966

Gregg, J. A., Callaghan, G. M., Hayes, S. C., & Glenn-Lawson, J. L. (2007). Improving diabetes self-management through acceptance, mindfulness, and values: A randomized controlled trial. Journal of Consulting and Clinical Psychology, 75(2), 336-343. https://doi.org/10.1037/0022-006X.75.2.336

This study is ineligible for review because it is not a study of the program or service under review (Handbook Version 2.0, Section 4.1.9)

Study 12698

Pakenham, K. I. (2015). Investigation of the utility of the acceptance and commitment therapy (ACT) framework for fostering self-care in clinical psychology trainees. Training and Education in Professional Psychology, 9(2), 144-152. https://doi.org/10.1037/tep0000074

This study is ineligible for review because it is not a study of the program or service under review (Handbook Version 2.0, Section 4.1.9)

Study 12618

Wetherell, J. L., Lui, L., Patterson, T. L., Afari, N., Ayers, C. R., Thorp, S. R., Stoddard, J. A., Ruberg, J., Kraft, A., Sorrell, J. T., & Petkus, A. J. (2011). Acceptance and commitment therapy for generalized anxiety disorder in older adults: A preliminary report. Behavior Therapy, 42(1), 127-134. https://doi.org/10.1016/j.beth.2010.07.002

This study is ineligible for review because it is not a study of the program or service under review (Handbook Version 2.0, Section 4.1.9)

Study 12517

Bagherzadeh Ledari, R., Masjedi, A., Bakhtyari, M., Zarghami, M., Nouri, R., & Hosseini, H. (2018). A comparison between the effectiveness of acceptance and commitment therapy and behavioral activation treatment for depression on symptoms severity and rumination among patients with treatment-resistant depression. Iranian Journal of Psychiatry and Behavioral Sciences, 12(3), e10742. https://doi.org/10.5812/ijpbs.10742

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12446

Casey, M.-B., Smart, K., Segurado, R., Hearty, C., Gopal, H., Lowry, D., Flanagan, D., McCracken, L., & Doody, C. (2018). Exercise combined with acceptance and commitment therapy (ExACT) compared to a supervised exercise programme for adults with chronic pain: Study protocol for a randomised controlled trial. Trials, 19, Article 194. https://doi.org/10.1186/s13063-018-2543-5

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13092

Juarascio, A., Shaw, J., Forman, E., Timko, C. A., Herbert, J., Butryn, M., Bunnell, D., Matteucci, A., & Lowe, M. (2013). Acceptance and commitment therapy as a novel treatment for eating disorders: An initial test of efficacy and mediation. Behavior Modification, 37(4), 459-489. https://doi.org/10.1177/0145445513478633

Juarascio, A., Kerrigan, S., Goldstein, S. P., Shaw, J., Forman, E. M., Butryn, M., & Herbert, J. D. (2013). Baseline eating disorder severity predicts response to an acceptance and commitment therapy-based group treatment. Journal of Contextual Behavioral Science, 2(3-4), 74-78. https://doi.org/10.1016/j.jcbs.2013.09.001

Juarascio, A., Shaw, J., Forman, E. M., Timko, C. A., Herbert, J. D., Butryn, M. L., & Lowe, M. (2013). Acceptance and commitment therapy for eating disorders: Clinical applications of a group treatment. Journal of Contextual Behavioral Science, 2(3-4), 85-94. https://doi.org/10.1016/j.jcbs.2013.08.001

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13505

Udell, C. J., Ruddy, J. L., & Procento, P. M. (2018). Effectiveness of acceptance and commitment therapy in increasing resilience and reducing attrition of injured US Navy recruits. Military Medicine, 183(9-10), e603-e611. https://doi.org/10.1093/milmed/usx109

This study is ineligible for review because it does not report program or service impacts on an eligible outcome (Handbook Version 2.0, Section 4.1.8)

Study 12435

Bell, L. V., Cornish, P., Flusk, D., Garland, S. N., & Rash, J. A. (2020). The INternet ThERapy for deprESsion Trial (INTEREST): Protocol for a patient-preference, randomised controlled feasibility trial comparing iACT, iCBT and attention control among individuals with comorbid chronic pain and depression. BMJ Open, 10(2), Article e033350. https://doi.org/10.1136/bmjopen-2019-033350

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12469

Fuchs, C. H., Haradhvala, N., Evans, D. R., Nash, J. M., Weisberg, R. B., & Uebelacker, L. A. (2016). Implementation of an acceptance- and mindfulness-based group for depression and anxiety in primary care: Initial outcomes. Families, Systems, & Health, 34(4), 386-395. https://doi.org/10.1037/fsh0000237

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12519

Rauwenhoff, J., Peeters, F., Bol, Y., & Van Heugten, C. (2019). The BrainACT study: Acceptance and commitment therapy for depressive and anxiety symptoms following acquired brain injury: Study protocol for a randomized controlled trial. Trials, 20, Article 773. https://doi.org/10.1186/s13063-019-3952-9

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12529

Sanabria-Mazo, J. P., Forero, C. G., Cristobal-Narváez, P., Suso-Ribera, C., García-Palacios, A., Colomer-Carbonell, A., Pérez-Aranda, A., Andrés-Rodríguez, L., McCracken, L. M., D'Amico, F., Estivill-Rodríguez, P., Carreras-Marcos, B., Montes-Pérez, A., Comps-Vicente, O., Esteve, M., Grasa, M., Rosa, A., Cuesta-Vargas, A. I., Maes, M., Borràs, X., Edo, S., Sanz, A., Feliu-Soler, A., Castaño-Asins, J. R., & Luciano, J. V. (2020). Efficacy, cost-utility and physiological effects of acceptance and commitment therapy (ACT) and behavioural activation treatment for depression (BATD) in patients with chronic low back pain and depression: Study protocol of a randomised, controlled trial including mobile-technology-based ecological momentary assessment (IMPACT study). BMJ Open, 10(7), Article e038107. https://doi.org/10.1136/bmjopen-2020-038107

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12533

Shand, F. L., Ridani, R., Tighe, J., & Christensen, H. (2013). The effectiveness of a suicide prevention app for indigenous Australian youths: Study protocol for a randomized controlled trial. Trials, 14, Article 396. https://doi.org/10.1186/1745-6215-14-396

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12582

Herzberg, K. N., Sheppard, S. C., Forsyth, J. P., Credé, M., Earleywine, M., & Eifert, G. H. (2012). The believability of anxious feelings and thoughts questionnaire (BAFT): A psychometric evaluation of cognitive fusion in a nonclinical and highly anxious community sample. Psychological Assessment, 24(4), 877-891. https://doi.org/10.1037/a0027782

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12632

Luoma, J. B., Kohlenberg, B. S., Hayes, S. C., Bunting, K., & Rye, A. K. (2008). Reducing self-stigma in substance abuse through acceptance and commitment therapy: Model, manual development, and pilot outcomes. Addiction Research & Theory, 16(2), 149-165. https://doi.org/10.1080/16066350701850295

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12649

Woidneck, M. R., Morrison, K. L., & Twohig, M. P. (2014). Acceptance and commitment therapy for the treatment of posttraumatic stress among adolescents. Behavior Modification, 38(4), 451-476. https://doi.org/10.1177/0145445513510527

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12699

Patterson, P., McDonald, F. E. J., Ciarrochi, J., Hayes, L., Tracey, D., Wakefield, C. E., & White, K. (2015). A study protocol for Truce: A pragmatic controlled trial of a seven-week acceptance and commitment therapy program for young people who have a parent with cancer. BMC Psychology, 3, Article 31. https://doi.org/10.1186/s40359-015-0087-y

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12711

Spatola, C. A. M., Manzoni, G. M., Castelnuovo, G., Malfatto, G., Facchini, M., Goodwin, C. L., Baruffi, M., & Molinari, E. (2014). The ACTonHEART study: Rationale and design of a randomized controlled clinical trial comparing a brief intervention based on acceptance and commitment therapy to usual secondary prevention care of coronary heart disease. Health and Quality of Life Outcomes, 12, Article 22. https://doi.org/10.1186/1477-7525-12-22

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12718

Tyrberg, M. J., Carlbring, P., & Lundgren, T. (2017). Implementation of acceptance and commitment therapy training in a psychiatric ward: Feasibility, lessons learned and potential effectiveness. Journal of Psychiatric Intensive Care, 13(2), 73-82. https://doi.org/10.20299/jpi.2017.008

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12980

Kroska, E. B., Hoel, S., Victory, A., Murphy, S. A., McInnis, M. G., Stowe, Z. N., & Cochran, A. (2020). Optimizing an acceptance and commitment therapy microintervention via a mobile app with two cohorts: Protocol for micro-randomized trials. JMIR Research Protocols, 9(9), Article e17086. https://doi.org/10.2196/17086

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 12996

Mull, A. A., Cleveland, C., Robinette, R., & Dixon, L. H. (2020). Pathways: An innovation in the delivery of college counseling services. Journal of College Student Psychotherapy, 34(1), 40-58. https://doi.org/10.1080/87568225.2018.1523698

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13011

Roddy, M. K., Boykin, D. M., Hadlandsmyth, K., Marchman, J. N., Green, D. M., Buckwalter IV, J. A., Garvin, L., Zimmerman, B., Bae, J., Cortesi, J., Rodrigues, M., Embree, J., Rakel, B. A., & Dindo, L. (2020). One-day acceptance and commitment therapy workshop for preventing persistent post-surgical pain and dysfunction in at-risk veterans: A randomized controlled trial protocol. Journal of Psychosomatic Research, 138, Article 110250. https://doi.org/10.1016/j.jpsychores.2020.110250

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13024

Whittingham, K., Sheffield, J., Mak, C., Dickinson, C., & Boyd, R. N. (2020). Early parenting acceptance and commitment therapy 'Early PACT' for parents of infants with cerebral palsy: A study protocol of a randomised controlled trial. BMJ Open, 10(10), Article e037033. https://doi.org/10.1136/bmjopen-2020-037033

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13073

Afari, N., Cuneo, J. G., Herbert, M., Miller, I., Webb-Murphy, J., Delaney, E., Peters, J., Materna, K., Miggantz, E., Godino, J., Golshan, S., & Wisbach, G. (2019). Design for a cohort-randomized trial of an acceptance and commitment therapy-enhanced weight management and fitness program for Navy personnel. Contemporary Clinical Trials Communications, 15, Article 100408. https://doi.org/10.1016/j.conctc.2019.100408

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13075

Banks, K. H., Goswami, S., Goodwin, D., Petty, J., Bell, V., & Musa, I. (2021). Interrupting internalized racial oppression: A community based ACT intervention. Journal of Contextual Behavioral Science, 20, 89-93. https://doi.org/10.1016/j.jcbs.2021.02.006

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13087

Gould, E. R., Tarbox, J., & Coyne, L. (2018). Evaluating the effects of acceptance and commitment training on the overt behavior of parents of children with autism. Journal of Contextual Behavioral Science, 7, 81-88. https://doi.org/10.1016/j.jcbs.2017.06.003

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13098

Lunsky, Y., Fung, K., Lake, J., Steel, L., & Bryce, K. (2018). Evaluation of acceptance and commitment therapy (ACT) for mothers of children and youth with autism spectrum disorder. Mindfulness, 9, 1110-1116. https://doi.org/10.1007/s12671-017-0846-3

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13390

Aasdahl, L., Pape, K., Vasseljen, O., Johnsen, R., & Fimland, M. S. (2019). Improved expectations about length of sick leave during occupational rehabilitation is associated with increased work participation. Journal of Occupational Rehabilitation, 29, 475-482. https://doi.org/10.1007/s10926-018-9808-4

This study is ineligible for review because it does not use an eligible comparison condition (Handbook Version 2.0, Section 4.1.7)

Study 13397

Barreto, M., Tran, T. A., & Gaynor, S. T. (2019). A single-session of acceptance and commitment therapy for health-related behavior change: An open trial with a nonconcurrent matched comparison group. Journal of Contextual Behavioral Science, 13, 17-26. https://doi.org/10.1016/j.jcbs.2019.06.003

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13401

Branstetter-Rost, A., Cushing, C., & Douleh, T. (2009). Personal values and pain tolerance: Does a values intervention add to acceptance? The Journal of Pain, 10(8), 887-892. https://doi.org/10.1016/j.jpain.2009.01.001

This study is ineligible for review because it does not report program or service impacts on an eligible outcome (Handbook Version 2.0, Section 4.1.8)

Study 13406

Carvalho, S. A., Trindade, I. A., Duarte, J., Menezes, P., Patrão, B., Nogueira, M. R., Guiomar, R., Lapa, T., Pinto-Gouveia, J., & Castilho, P. (2021). Efficacy of an ACT and compassion-based eHealth program for self-management of chronic pain (iACTwithPain): Study protocol for a randomized controlled trial. Frontiers in Psychology, 12, Article 630766. https://doi.org/10.3389/fpsyg.2021.630766

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13430

García, R. F., Villa, R. S., Cepeda, N. T., Cueto, E. G., & Montes, J. M. G. (2004). Efecto de la hipnosis y la terapia de aceptación y compromiso (ACT) en la mejora de la fuerza física en piragüistas. International Journal of Clinical and Health Psychology, 4(3), 481-493. https://psycnet.apa.org/record/2004-19168-002

This study is ineligible for review because it does not meet the language of publication criteria (Handbook Version 2.0, Section 4.1.3)

Study 13433

Gómez-Pérez, M. C., García-Palacios, A., Castilla, D., Zaragozá, I., & Suso-Ribera, C. (2020). Brief acceptance and commitment therapy for fibromyalgia: Feasibility and effectiveness of a replicated single-case design. Pain Research & Management, 2020(1), 1-11, Article 7897268. https://doi.org/10.1155/2020/7897268

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13448

Kallesøe, K. H., Schröder, A., Wicksell, R. K., Fink, P., Ørnbøl, E., & Rask, C. U. (2016). Comparing group-based acceptance and commitment therapy (ACT) with enhanced usual care for adolescents with functional somatic syndromes: A study protocol for a randomised trial. BMJ Open, 6(9), Article e012743. https://doi.org/10.1136/bmjopen-2016-012743

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13459

Lindholm-Olinder, A., Fischier, J., Fries, J., Alfonsson, S., Elvingson, V., Eriksson, J. W., & Leksell, J. (2015). A randomised wait-list controlled clinical trial of the effects of acceptance and commitment therapy in patients with type 1 diabetes: A study protocol. BMC Nursing, 14, Article 61. https://doi.org/10.1186/s12912-015-0101-y

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13462

Low, J., Serfaty, M., Davis, S., Vickerstaff, V., Gola, A., Omar, R. Z., King, M., Tookman, A., St. John Austen, J., Turner, K., & Jones, L. (2016). Acceptance and commitment therapy for adults with advanced cancer (CanACT): Study protocol for a feasibility randomised controlled trial. Trials, 17, Article 77. https://doi.org/10.1186/s13063-016-1169-8

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13468

McCracken, L. M. (2011). Unexpected targets in treatment for chronic pain. Psychologist, 24(12), 898-899.

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13469

McCracken, L. M., Sato, A., Wainwright, D., House, W., & Taylor, G. J. (2014). A feasibility study of brief group-based acceptance and commitment therapy for chronic pain in general practice: Recruitment, attendance, and patient views. Primary Health Care Research and Development, 15(3), 312-323. https://doi.org/10.1017/S1463423613000273

This study is ineligible for review because it does not report program or service impacts on an eligible outcome (Handbook Version 2.0, Section 4.1.8)

Study 13470

McCracken, L. M., Davies, M., Scott, W., Paroli, M., Harris, S., & Sanderson, K. (2015). Can a psychologically based treatment help people to live with chronic pain when they are seeking a procedure to reduce it? Pain Medicine, 16(3), 451-459. https://doi.org/10.1111/pme.12623

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13476

Mosher, C. E., Krueger, E., Hirsh, A. T., Miller, K. D., Ballinger, T. J., Storniolo, A. M., Schneider, B. P., Newton, E. V., Champion, V. L., & Johns, S. A. (2020). Protocol of a randomized trial of acceptance and commitment therapy for fatigue interference in metastatic breast cancer. Contemporary Clinical Trials, 98, Article 106108. https://doi.org/10.1016/j.cct.2020.106168

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)

Study 13493

Sandoz, E. K., Kellum, K. K., & Wilson, K. G. (2017). Feasibility and preliminary effectiveness of acceptance and commitment training for academic success of at-risk college students from low income families. Journal of Contextual Behavioral Science, 6(1), 71-79. https://doi.org/10.1016/j.jcbs.2017.01.001

This study is ineligible for review because it does not report program or service impacts on an eligible outcome (Handbook Version 2.0, Section 4.1.8)

Study 13503

Terhorst, Y., Braun, L., Titzler, I., Buntrock, C., Freund, J., Thielecke, J., Ebert, D., & Baumeister, H. (2020). Clinical and cost-effectiveness of a guided internet-based acceptance and commitment therapy to improve chronic pain-related disability in green professions (PACT-A): Study protocol of a pragmatic randomised controlled trial. BMJ Open, 10(9), Article e034271. https://doi.org/10.1136/bmjopen-2019-034271

This study is ineligible for review because it does not use an eligible study design (Handbook Version 2.0, Section 4.1.5)