ACT Group Intervention Research
Here are just a few of the studies on ACT done in groups (some of these also have individual sessions, but all have groups as a substantial part of the intervention):
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, 156-163.
Zettle, R. D., & Raines, J. C. (1989). Group cognitive and contextual therapies in treatment of depression. Journal of Clinical Psychology, 45,438-445.
Hayes, S. C., Bissett, R., Roget, N., Padilla, M., Kohlenberg, B. S., Fisher, G., Masuda, A., Pistorello, J., Rye, A. K., Berry, K. & Niccolls, R. (2004). The impact of acceptance and commitment training and multicultural training on the stigmatizing attitudes and professional burnout of substance abuse counselors. Behavior Therapy, 35, 821-835.
Hayes, S. C., Wilson, K. G., Gifford, E. V., Bissett, R., Piasecki, M., Batten, S. V., Byrd, M., & Gregg, J. (2004). A randomized controlled trial of twelve-step facilitation and acceptance and commitment therapy with polysubstance abusing methadone maintained opiate addicts. Behavior Therapy, 35, 667-688.
Gifford, E. V., Kohlenberg, B. S., Hayes, S. C., Antonuccio, D. O., Piasecki, M. M.., Rasmussen-Hall, M. L., & Palm, K. M. (2004). Acceptance theory-based treatment for smoking cessation: An initial trial of Acceptance and Commitment Therapy. Behavior Therapy, 35, 689-705.
McCracken, L. M, Vowles, K. E., & Eccleston, C. (2005). Acceptance-based treatment for persons with complex, long-standing chronic pain: A preliminary analysis of treatment outcome in comparison to a waiting phase. Behaviour Research and Therapy, 43, 1335-1346.
Gratz, K. L. & Gunderson, J. G. (2006). Preliminary data on an acceptance-based emotion regulation group intervention for deliberate self-harm among women with Borderline Personality Disorder. Behavior Therapy, 37, 25-35.
Blackledge, J. T. & Hayes, S. C. (2006). Using Acceptance and Commitment Training in the support of parents of children diagnosed with autism. Child & Family Behavior Therapy, 28 (1), 1-18.
Lundgren, A. T., Dahl, J., Melin, L. & Kees, B. (2006). Evaluation of Acceptance and Commitment Therapy for drug refractory epilepsy: A randomized controlled trial in South Africa. Epilepsia, 47, 2173-2179.
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.
Luoma, J. B., Hayes, S. C., Roget, N., Fisher, G., Padilla, M., Bissett, R., Kohlenberg, B. K. , Holt, C., & & Twohig, M. P. (2008). Augmenting continuing education with psychologically-focused group consultation: Effects on adoption of Group Drug Counseling. Psychotherapy Theory, Research, Practice, Training, 44, 463-469.
Varra, A. A., Hayes, S. C., Roget, N., & Fisher, G. (2008). A randomized control trial examining the effect of Acceptance and Commitment Training on clinician willingness to use evidence-based pharmacotherapy. Journal of Consulting and Clinical Psychology, 76, 449-458.
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, 58-69.
Tapper, K., Shaw, C., Ilsley, J., Hill, A. J., Bond, F. W., & Moore, L. (2009). Exploratory randomised controlled trial of a mindfulness-based weight loss intervention for women. Appetite, 52, 396–404.
Flaxman, P. E. & Bond, F. W. (2010). A randomised worksite comparison of acceptance and commitment therapy and stress inoculation training. Behaviour Research and Therapy 43, 816-820.
Flaxman, P. E., & Bond, F. W. (2010). Worksite stress management training: Moderated effects and clinical significance. Journal of Occupational Health Psychology, 15, 347-358.
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, 10, 2372-2378.
Bohlmeijer, E. T., Fledderus, M., Rokx, T. A., & Pieterse, M. E. (2011). Efficacy of an early intervention based on acceptance and commitment therapy for adults with depressive symptomatology: Evaluation in a randomized controlled trial. Behaviour Research and Therapy, 49, 62-67.
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, 389-398.
Pearson, A. N., Follette, V. M. & Hayes, S. C. (in press). A pilot study of Acceptance and Commitment Therapy (ACT) as a workshop intervention for body dissatisfaction and disordered eating attitudes. Cognitive and Behavioral Practice.
Luoma, J. B., Kohlenberg, B. S., Hayes, S. C. & Fletcher, L. (in press). Slow and steady wins the race: A randomized clinical trial of Acceptance and Commitment Therapy targeting shame in substance use disorders. Journal of Consulting and Clinical Psychology.
Morton, J., Snowdon, S., Gopold, M. & Guymer, E. (in press). Acceptance and Commitment Therapy group treatment for symptoms of Borderline Personality Disorder: A public sector pilot study. Cognitive and Behavioral Practice.
Folke, F., Parling, T., & Melin, L. (in press). Acceptance and Commitment Therapy for depression: A preliminary randomized clinical trial for unemployed on long-term sick leave. Cognitive and Behavioral Practice.
Biglan, A., Layton, G. L., Backen Jones, L., Hankins, M. & Rusby, J. C. (in press). The value of workshops on psychological flexibility for early childhood special education staff. Topics in Early Childhood Special Education.
Most of these studies are in the publications area of the site (and if one is missing prompt the author to get it up there).

Comments
Value Based Group Interventions
Hi Everyone,
I am beginning my Masters in Counselling Psychology in the fall and am preparing my funding proposal. I am interested in studying value based interventions (in groups or in therapy) and was wondering if anyone has any outcome data on the effects of these types of interventions. I read about some of the studies that are underway such as Plumb, Levin and Hayes study on studying behavior and Ciarrochi and colleagues studies on couple satisfaction, police workers, and quality of life in cancer patients. I would be very grateful for any information regarding these or any other related studies.
Thanks in advance!
Robin Grumet
ACT in groups
Group treatments are quite rarely studied in a randomized trial fashion, so this is unusual. I hadn't quite realized there were so many studies that used group designs. As of Dec. 2006, it appears that almost half of the completed group studies on ACT involved group treatments as a part of the design. That seems rare.
Actually, this even more makes me think that we need to pay more attention to the issue of dependence of data in group designs since so many of the studies involve group treatments...Someone might want to take a look at the data again to control for that? Also makes me wonder whether we shouldn't begin to include group process measures in our designs such as group cohesion (similar to therapeutic alliance).
carer group research
Hi,
Is anyone aware of any recently published reasearch concerning group ACT programmes for carers (of some form)?
Cheers
Jonathan
carers
Jonathan,
I'm not completely sure what you mean by carers, but there was one study using ACT to target burnout and stigma in addictions counselors. The intervention was done in a group workshop format. Its published in Behavior Therapy in 2004 with Steve Hayes as the first author. Are those the types of carers you are talking about?
Hi Jason, Thanks very much
Hi Jason, Thanks very much for your message.
That paper will probably be a useful starting point actually, although I was more thinking of carers in the sense of families providing care for relatives such as those with a learning disability, or a brain injury.
Thanks again!
Jonathan
Also, i'm not particularly
Also, i'm not particularly hot on research methods, could you explain what you mean't in your thread about 'dependence of data' in group design. Thanks!
Dependence in group design
There is a assumption in most statistical tests that all observations are independent. The problem in group treatments is that observations are not independent because individuals are in the same group and therefor can influence each other. The statistics need to be adjusted for this violation of the assumption of independence. New statistical models exist to handle this, but at little used. i was just saying that we need to use these.
Hope that helps.