These are a beginning list of process studies in ACT that are not based on self-report instruments per se: interview studies, analyses of transcripts, and the like. If you see find additional ones let ACBS staff know and ask them to add the reference to this page: community@contextualscience.org
Storey, A., Nash, E., Dempsey, H., McIvor, K., & Zarotti, N. (2025 in press). “It’s knowing that there are other people and they’ve accepted it”: Patients’ experiences of an acceptance and commitment therapy group intervention for people with neurological conditions. Neuropsychological Rehabilitation. DOI: 10.1080/09602011.2025.2457666
Allen, V., Lottridge, D., Merry, S., Stasiak, K. (2024). Building a digital tool to support focused acceptance and commitment therapy practitioners in New Zealand primary care: A qualitative exploration of user needs to guide software feature development. Journal of Contextual Behavioral Science, 32, 100762. https://doi.org/10.1016/j.jcbs.2024.100762
Bardon, C., Rioux, M. É., Rivard, M. et al. (2024). Connect-ROD – development and qualitative evaluation of a community-based group intervention to support well-being in patients with a rare or orphan disease. Orphanet Journal of Rare Diseases, 19, 254. DOI: 10.1186/s13023-024-03252-4
Bibby, K., McDonald, F.E.J., Ciarrochi, J., Allison, K.R., Hulbert-Williams, N.J., Konings, S., Wright, A., Tracey, D., & Patterson, P.(2024). Truce: Outcomes and mechanisms of change of a seven-week acceptance and commitment therapy program for young people whose parent has cancer. Journal of Contextual Behavioral Science, 33, 100813. https://doi.org/10.1016/j.jcbs.2024.100813
Børtveit, L., Nordgreen, T., & Nordahl-Hansen, A. (2024). Exploring experiences with an internet-delivered ACT intervention among individuals with a personal history of depression: A thematic analysis. Acta Psychologica, 250, 104510. DOI: 10.1016/j.actpsy.2024.104510
Bouws, J., Henrard, A., de Koning, M., Schirmbeck, F., van Ghesel Grothe, S., van Aubel, E., Reininghaus, U., de Haan, L., & Myin-Germeys, I. (2024). Acceptance and Commitment Therapy for individuals at risk for psychosis or with a first psychotic episode: A qualitative study on patients' perspectives. Early Intervention in Psychiatry, 18(2), 122–131. DOI: 10.1111/eip.13442
Brovold, F., Laugen, N. J., & Grøtte, T. (2024). “And I Can Remind Myself That I Am All Of This”: adolescents’ experiences of group-based acceptance and commitment therapy. Frontiers in Psychology, 15, 1458421. DOI: 10.3389/fpsyg.2024.1458421
Donovan, S., Chalder, T., Gopal, D. et al. (2024). Qualitative study of experience of acceptance and commitment therapy (ACT+) amongst Survivors' Rehabilitation Evaluation after Cancer (SURECAN) trial participants and therapists: A protocol. NIHR Open Res, 3, 24 https://doi.org/10.3310/nihropenres.13382.2
Emezue, C., Dan-Irabor, D., Froilan, A., Dunlap, A., Zamora, P., Negron, S., Simmons, J., Watkins, J., Julion, W. A., & Karnik, N. S. (2024). Evaluating an App-Based Intervention for Preventing Firearm Violence and Substance Use in Young Black Boys and Men: Usability Evaluation Study. JMIR formative research, 8, e60918. DOI: 10.2196/60918
Evans, N., Ahmadi, N., Morgan, A., Zalmai, S., Milner, K.M., Atif, M. F., Graham, H. R. (2024). Supporting caregivers of children living with disability in a humanitarian context: realist-informed evaluation of the ‘Mighty Children’ programme in Afghanistan. BMJ Global Health, 9, e012989. DOI: 10.1136/bmjgh-2023-012989
Grégoire, S., Saules, G., Cyr, E., & Lachance, L. (2024). L’expérience d’étudiants universitaires ayant agi comme pairs aidants dans le cadre du programme Korsa. Canadian Journal of Education / Revue Canadienne De l’éducation, 47(2), 411–437. DOI: 10.53967/cje-rce.5741
Huish, E., Donnelly, O., & Marks, E. (2024). "I Really Felt the Feeling": A Systematic Review and Qualitative Thematic Synthesis of Healthcare Workers' Experiences of Acceptance and Commitment Therapy Training. Journal of cognitive psychotherapy, 38(2), 94–118. DOI: 10.1891/JCP-2022-0030
Kudlek, L., Jones, R. A., Hughes, C., Duschinsky, R., Hill, A., Richards, R., Thompson, M., Vincent, A., Griffin, S. J. & Ahern, A. L. (2024). Experiences of emotional eating in an Acceptance and Commitment Therapy based weight management intervention (SWiM): A qualitative study. Appetite, 193, 107138. DOI: 10.1016/j.appet.2023.107138
Maillé, S., Beaulieu, F., Lachance, L., & Grégoire, S. (2024). Barriers and Facilitators to the Implementation of a Peer Support Intervention in Universities. Journal of College Student Mental Health, 39(1), 86–109. DOI: 10.1080/28367138.2024.2325437
Qin, F., Zhu, Y., Zhang, L., Wang, Z., & Wan H. (2024). 肿瘤放疗患者参加接纳承诺疗法体验的质性研究 [A qualitative study on experience of acceptance and commitment therapy in cancer patients undergoing radiotherapy]. Chinese Journal of Modern Nursing, 30(01), 21-27. DOI: 10.3760/cma.j.cn115682-20230521-01997
Rawlinson, C., Gould, R. L., McDermott, C. J., Thompson, B., Weeks, K., Gossage-Worrall, R., et al.(2024). Experiences of acceptance and commitment therapy for people living with motor neuron disease (MND): a qualitative study from the perspective of people living with MND and therapists. The Cognitive Behaviour Therapist, 17, e36. DOI: 10.1017/S1754470X24000333
Shepley, E. L., Jackson, M. C., & Hogan, L. M. (2024). A Qualitative Exploration of the Process and Experience of Change in Moving on in My Recovery: An Acceptance and Commitment Therapy Based Recovery Group for Substance Use Disorder. Behavioral Sciences, 14(12), 1237. DOI: 10.3390/bs14121237
Edwards, V., Vari, C., Rose, M., Graham, C.D., O'Connell, N., Taylor, E., McCracken, L.M., Radunovic, A., Rakowicz, W., Norton, S., & Chalder, T. (2023). Participant experiences of guided self-help Acceptance and Commitment Therapy for improving quality of life in muscle disease: a nested qualitative study within the ACTMus randomized controlled trial. Frontiers in Psychology, 14, 1233526. DOI: 10.3389/fpsyg.2023.1233526
Han, A., Yuen, H. K., Jenkins, J., & Edwards, L. (2023). A qualitative study exploring experiences of female family caregivers of people with dementia in acceptance and commitment therapy. Clinical Psychologist, 28(1), 26–36. DOI: 10.1080/13284207.2023.2285803
Leung, D, K, Y., Wong, F. H. C., Wong, E. L. Y., et al (2023). Technology Affordance in an Information and Communication Technology Delivered Group Psychotherapy and Exercise Program for Older People With Depressive Symptoms: A Multiple Triangulation Qualitative Study. Innovation in Aging, 7(6) igad063. DOI: 10.1093/geroni/igad063
Musanje, K., Kamya, M. R., Kasujja, R., Hooper, N., Katahoire, A. R., White, R. G., Kimera, E., Getahun, M., Sinclair, D. L., Ojiambo, D., & Camlin, C. S. (2023). Acceptability of an adapted mindfulness and acceptance-based intervention to support adolescents with HIV: A qualitative study with Ugandan health care providers. Journal of Contextual Behavioral Science, 29, 160-168. https://doi.org/10.1016/j.jcbs.2023.07.002
Ruan, J., Cheng, H., Wu, L., Mak, Y. M., Zhang, X., Liang, J., Ma, H., Li, S., & Yeung, W. F. (2023). Perceptions and experiences of acceptance and commitment therapy among people with mental disorders: A qualitative systematic review. Journal of Contextual Behavioral Science, 30, 80-96. https://doi.org/10.1016/j.jcbs.2023.09.003
Sanabria-Mazo, J.P., Colomer-Carbonell, A., Gandara-Urrutia, N., Pérez-Sutil, J.M., Noboa-Rocamora, G., Fernández-Vázquez, Ó., Val-Mariano, G., Fontana-McNally, M., Cardona-Ros, G., Feliu-Soler, A., McCracken, L.M., Edo, S., Sanz, A., & Luciano, J.V. (2023) Experiences of patients with chronic low back pain plus comorbid depressive symptoms in a videoconference group acceptance and commitment therapy or behavioral activation treatment for depression: a qualitative study. Disability and Rehabilitation, 46(21), 5052–5063. DOI: 10.1080/09638288.2023.2298265
Schenk, S., Genent, D., Hartenstein-Pinter, A. Zernikow, B. & Wager, J. (2023). Spezifische Therapiebedürfnisse junger Erwachsener mit chronischen Schmerzen: Ergebnisse einer qualitativen Interviewstudie. [Specific therapy needs of young adults with chronic pain: Results of a qualitative interview study]. Der Schmerz, 37, 19-28. DOI: 10.1007/s00482-021-00617-7
Seery, C., Leonard-Curtin, A., Naismith, L., King, N., Kilbride, K., Wrigley, M., Boyd, C., McHugh, L., & Bramham, J. (2023). The understanding and managing adult ADHD programme: A qualitative evaluation of online psychoeducation with acceptance and commitment therapy for adults with ADHD. Journal of Contextual Behavioral Science, 29, 254-263. https://doi.org/10.1016/j.jcbs.2023.08.005
van der Horst, A. Y., Bohlmeijer, E. T., Schreurs, K. M. G. & Kelders, S. M. (2023) Strength Back – A qualitative study on the co-creation of a positive psychology digital health intervention for spinal surgery patients. Frontiers in Psychology, 14, 1117357. DOI: 10.3389/fpsyg.2023.1117357
Zancan, R. K., Constantinopolos, L. B., Pankowski, B. E., Bellini, B. D., & Oliveira, M. da S. (2023). Terapia de Aceitação e Compromisso para Universitários: Um Estudo Qualitativo. Revista Psicologia: Teoria E Prática, 25(1), ePTPPE14535. DOI: 10.5935/1980-6906/ePTPPE14535.en
Arch, J.J., Slivjak, E., Bright, E.E., et al. (2022). Leveraging values to promote adherence to endocrine therapy among breast cancer survivors: A mixed-methods investigation. Journal of Contextual Behavioral Science, 25, 122-129. https://doi.org/10.1016/j.jcbs.2022.07.002
Aymerich, K., Wilczek, A., Ratanachatchuchai, S., Gilpin, H.R., Spahr, N., Jacobs, C., & Scott, W. (2022). "Living more and struggling less”: a qualitative descriptive study of patient experiences of physiotherapy informed by Acceptance and Commitment Therapy within a multidisciplinary pain management programme. Physiotherapy, 116, 33-41. DOI: 10.1016/j.physio.2022.01.004
Contreras, M., Van Hout, E., Farquhar, M., McCracken, L.M., Gould, R.L., Hornberger, M., Richmond, E., & Kishita, N. (2022). Internet-delivered guided self-help Acceptance and Commitment Therapy for family carers of people with dementia (iACT4CARERS): a qualitative study of carer views and acceptability. International Journal of Qualitative Studies on Health and Well-being, 17(1). DOI: 10.1080/17482631.2022.2066255
de Medeiros, A.G.A. & Hartmann Junior, J.A.S. (2022). A experiência da psicoterapia na terceira idade: uma análise a partir da terapia de aceitação e compromisso. In Novas diretrizes frente ao envelhecimento: diversidades, cuidados, inclusão e visibilidad, E-book VIII CIEH 2021. Campina Grande: Realize Editora. DOI: 10.46943/VIII.CIEH.2021.01.002
Engström, A.H., Bohm-Starke, N., Kullinger, M., Högberg, U., Buhrman, M., Skalkidou, A., & Widarsson, M. (2022). Experiences of internet-based treatment for vulvodynia: A qualitative study. Sexual & Reproductive Healthcare, 33, 100756. DOI: 10.1016/j.srhc.2022.100756
Galea Holmes, M. N., Wileman, V., Hassan, S., Denning, J., Critchley, D., Norton, S., McCracken, L. M., & Godfrey, E. (2022). Physiotherapy informed by Acceptance and Commitment Therapy for chronic low back pain: A mixed-methods treatment fidelity evaluation. British Journal of Health Psychology, 27, 935-955. DOI: 10.1111/bjhp.12583
Giovannetti, A.M., Messmer Uccelli, M., Solari, A., & Pakenham, K.I. (2022). Evaluation of a program for training psychologists in an acceptance and commitment therapy resilience intervention for people with multiple sclerosis: a single-arm longitudinal design with a nested qualitative study. Disability and Rehabilitation, 44(22), 6926-6938. DOI: 10.1080/09638288.2022.2025926
Jones, R.A., Richards, R., Palat, R., Hughes, C., Hill, A.J., Vincent, A., Griffin, S.J., Ahern, A.L., & Duschinsky, R. (2022) Participants' experiences of mental health during a COVID-19 tailored ACT-based behavioural weight management intervention: a qualitative study. International Journal of Qualitative Studies on Health and Well-being, 17(1). DOI: 10.1080/17482631.2022.2123093
Moschopoulou, E., Brewin, D., Ridge, D. et al. (2022). Evaluating an interactive acceptance and commitment therapy (ACT) workshop delivered to trained therapists working with cancer patients in the United Kingdom: a mixed methods approach. BMC Cancer, 22, 651. DOI: 10.1186/s12885-022-09745-4
Nedelcu, A., & Grégoire, S. (2020). Evaluating the Implementation of an Intervention Based on Acceptance and Commitment Therapy in Postsecondary Institutions. Journal of College Student Psychotherapy, 36(1), 95-112. DOI: 10.1080/87568225.2020.1806162
Sato, C., Adumattah, A., Abulencia, M.K., Garcellano, P.D., Li, A.T., Fung, K., Poon, M.K., Vahabi, M., & Wong, J.P. (2022). COVID-19 Mental Health Stressors of Health Care Providers in the Pandemic Acceptance and Commitment to Empowerment Response (PACER) Intervention: Qualitative Study. JMIR Formative Research, 6(3), e35280. DOI: 10.2196/35280
Zhao, C., Ren, Z., Jiang, G., & Zhang, L. (2022). Mechanisms of change in an internet-based ACT study for depression in China. Journal of Contextual Behavioral Science, 24, 51-59. https://doi.org/10.1016/j.jcbs.2022.03.004
Bahattab, M. & AlHadi, A.N. (2021). Acceptance and commitment group therapy among Saudi Muslim females with mental health disorders. Journal of Contextual Behavioral Science, 19, 86-91. https://doi.org/10.1016/j.jcbs.2021.01.005
Bloy, S., Morris, E. M. J., Johns, L. C., Cooke, A., & Oliver, J. E. (2021). “My voices are just part of me, they don’t own me”: a qualitative investigation of Acceptance and Commitment Therapy groups for people experiencing psychosis. Psychosis, Volume 13 2021 (3), 295-208. DOI: 10.1080/17522439.2020.1870542
Clery, P., Starbuck, J., Laffan, A., et al (2021). Qualitative study of the acceptability and feasibility of acceptance and commitment therapy for adolescents with chronic fatigue syndrome. BMJ Paediatrics Open, 5, e001139. DOI: 10.1136/bmjpo-2021-001139
Elander, J., Kapadi, R., Coyne, E., Taal, M. W., Selby, N. M., Stalker, C. & Mitchell, K. (2021). Using patient feedback to adapt intervention materials based on acceptance and commitment therapy for people receiving renal dialysis. BMC Urology, 21, 157. DOI: 10.1186/s12894-021-00921-5
Galea Holmes, M.N., Wileman, V., McCracken, L.M., Critchley, D., March, M.K., Norton, S., Moss-Morris, R., Noonan, S., Barcellona, M., & Godfrey, E. (2021). Experiences of training and delivery of Physical therapy informed by Acceptance and Commitment Therapy (PACT): a longitudinal qualitative study. Physiotherapy, 112, 41-48. DOI: 10.1016/j.physio.2020.12.004
Gates, J., Goldstone, E., Clemente, J., Cugnetto, M., Morris, E. M. J., & Farhall, J. (2021). Adapting and implementing Acceptance and Commitment Therapy groups to support personal recovery of adults living with psychosis: a qualitative study of facilitators’ experiences. Psychosis, 14(4), 322–332. DOI: 10.1080/17522439.2021.1957991
Fogelkvist, M., Parling, T., Kjellin, L., & Gustafsson, S.A. (2021) Live with your body – participants’ reflections on an acceptance and commitment therapy group intervention for patients with residual eating disorder symptoms. Journal of Contextual Behavioral Science, 20, 184-193. https://doi.org/10.1016/j.jcbs.2021.04.006
Hulbert-Williams, N. J., Norwood, S. F., Gillanders, D., Finucane, A. M., Spiller, J., Strachan, J., Millington, S., Kreft, J., & Swash, B. (2021). Brief Engagement and Acceptance Coaching for Hospice Settings (the BEACHeS study): results from a Phase I study of acceptability and initial effectiveness in people with non-curative cancer. BMC palliative care, 20(1), 96. DOI: 10.1186/s12904-021-00801-7
Margolies, S.O., Patidar, S.M., Chidgey, B.A., Goetzinger, A., Sanford, J.B. & Short, N.A. (2021) Growth in crisis: A mixed methods study of lessons from our patients with chronic pain during the COVID-19 pandemic. Journal of Contextual Behavioral Science, 19, 12-16. https://doi.org/10.1016/j.jcbs.2020.10.010
Yıldız, E. & Aylaz, R. (2021). How Counseling Based on Acceptance and Commitment Therapy and Supported With Motivational Interviewing Affects the Perceptions of Treatment Motivation in Patients Diagnosed With Schizophrenia: A Qualitative Study. Journal of the American Psychiatric Nurses Association, 27(5), 390-404. DOI: 10.1177/1078390320945380
Bendelin, N., Björkdahl, P., Risell, M., Zetterqvist Nelson, K., Gerdle, B., Andersson, G. & Buhrman, M. (2020) Patients’ experiences of internet-based Acceptance and commitment therapy for chronic pain: a qualitative study. BMC Musculoskelet Disord, 21, 212. DOI: 10.1186/s12891-020-03198-1
Casey, M.-B., Murphy, D., Neary, R., Wade, C., Hearty, C. & Doody, C. (2020) Individuals perspectives related to acceptance, values and mindfulness following participation in an acceptance-based pain management programme. Journal of Contextual Behavioral Science, 16, 96-102. https://doi.org/10.1016/j.jcbs.2020.03.005
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). DOI: 10.1371/journal.pone.0231380
Sairanen, E., Lappalainen, R., Lappalainen, P., & Hiltunen, A. (2020). Mediators of change in online acceptance and commitment therapy for psychological symptoms of parents of children with chronic conditions: An investigation of change processes. Journal of Contextual Behavioral Science, 15, 123-130. https://doi.org/10.1016/j.jcbs.2019.11.010
de Wit, J., Vervoort, S. C. J. M., van Eerden, E., van den Berg, L. H., Visser-Meily, J. M. A., Beelen, A., & Schröder, C. D. (2019). User perspectives on a psychosocial blended support program for partners of patients with amyotrophic lateral sclerosis and progressive muscular atrophy: a qualitative study. BMC Psychology, 7, 35. DOI: 10.1186/s40359-019-0308-x
Gismervik, S.Ø., Fimland, M.S., Fors, E.A., Johnsen, R., & Rise, M.B. (2019). The acceptance and commitment therapy model in occupational rehabilitation of musculoskeletal and common mental disorders: a qualitative focus group study. Disability and Rehabilitation, 41(26), 3181-3191. DOI: 10.1080/09638288.2018.1490824
Woolf-King, S.E., Sheinfil, A.Z., Babowich, J.D., Siedle-Khan, B., Loitsch, A. & Maisto, S.A. (2019). Acceptance and Commitment Therapy (ACT) for HIV-infected Hazardous Drinkers: A Qualitative Study of Acceptability. Alcoholism Treatment Quarterly, 37(3), 342-358. DOI: 10.1080/07347324.2018.1539630
Bazley, R., & Pakenham, K. (2018). Feasibility evaluation of the HOLLY program: an ACT-based suicide prevention program for Christian faith-based organisations. Advances in Mental Health, 18(2), 115–130. DOI: 10.1080/18387357.2018.1557015
Bendelin, N., Gerdle, B., & Andersson, G. (2018). Internet-delivered aftercare following multimodal rehabilitation program for chronic pain: a qualitative feasibility study. Journal of Pain Research, 11, 1715-1728. DOI: 10.2147/JPR.S157939
Thompson, M., Vowles, K. E., Sowden, G., Ashworth, J., & Levell, J. (2018). A qualitative analysis of patient‐identified adaptive behaviour changes following interdisciplinary Acceptance and Commitment Therapy for chronic pain. European Journal of Pain.
DOI: 10.1002/ejp.1184
Tyrberg, M.J., Carlbring, P. & Lundgren, T. (2017) Usefulness of the ACT model for nurses in psychiatric inpatient care: A qualitative content analysis. Journal of Contextual Behavioral Science, 6(2), 208-214. https://doi.org/10.1016/j.jcbs.2017.04.011
Köhle, N., Drossaert, C.H.C., Jaran, J. et al. (2017) User-experiences with a web-based self-help intervention for partners of cancer patients based on acceptance and commitment therapy and self-compassion: a qualitative study. BMC Public Health 17, 225. DOI: 10.1186/s12889-017-4121-2
Fogelkvist, M., Parling, T., Kjellin, L. et al. (2016). A qualitative analysis of participants’ reflections on body image during participation in a randomized controlled trial of acceptance and commitment therapy. Journal of Eating Disorders, 4, 29. DOI: 10.1186/s40337-016-0120-4
Critchley, D.J. et al. (2016). “A light bulb moment!” Physiotherapists’ experiences of delivering Physiotherapy informed by Acceptance and Commitment Therapy (PACT). Physiotherapy, 102, e230 - e231. DOI: 10.1016/j.physio.2016.10.285
Fitzpatrick, M., Henson, A., Grumet, R., Poolokasingham, G., Foa, C., Comeau, T., & Prendergast, C. (2016). Challenge, focus, inspiration and support: Processes of values clarification and congruence. Journal of Contextual Behavioral Science, 5, 7–15. https://doi.org/10.1016/j.jcbs.2016.02.001 Sixteen clients who went through an ACT-based values workshop were interviews and a qualitative method called Thematic Analysis was applied to the transcripts. Participants were generally motivated to work on values because of life challenges. Behavioral changes were linked to focused attention, inspiration by values work, and the support of others.
Thompson-Janes, E., Brice, S., McElroy, R., Abbott, J., & Ball, J. (2016). Learning from the experts: a thematic analysis of parent's experiences of attending a therapeutic group for parents of children with learning disabilities and challenging behaviour, British Journal of Learning Diaabilities, 44, 95-102. DOI: 10.1111/bld.12115 Qualitiative interviews of ACT-based group for parents of children with learning disabilities and behaviour problems were scored using thematic analysis. Four main themes were identified: (i) parent's pre-group narratives, (ii) barriers and solutions, (iii) positive aspects of the program and (iv) positive outcomes
Casselman R. B. & Pemberton, J. R. (2015). ACT-Based Parenting Group for Veterans With PTSD: Development and Preliminary Outcomes. The American Journal of Family Therapy, 43, 57-66. DOI: 10.1080/01926187.2014.939003 There is a qualitative measure in this study on ACT for veteran’s w/ PTSD who are parents.
Rise, M.B., Gismervik, S.Ø., Johnsen, R. et al. (2015). Sick-listed persons’ experiences with taking part in an in-patient occupational rehabilitation program based on Acceptance and Commitment Therapy: a qualitative focus group interview study. BMC Health Services Research, 15, 526. DOI: 10.1186/s12913-015-1190-8
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
Goodwin, J., Cummins, J., Behan, L. & O’Brien, S. M. (2015) Development of a mental health smartphone app: perspectives of mental health service users. Journal of Mental Health, 25, 434-440. DOI: 10.3109/09638237.2015.1124392 The experiences of people using an ACT based smart phone app were coded in this study.
Hoffman, D., Halsboe, L., Eilenberg, T., Jensen, J. S., & Frostholm, L. (2014). A pilot study of processes of change in group-based acceptance and commitment therapy for health anxiety. Journal of Contextual Behavioral Science, 3, 189-195. https://doi.org/10.1016/j.jcbs.2014.04.004
Berman, M. I., Hill, C. E., Liu, J., Jackson, J., Sim, W., & Spangler, P. (2012). Relational events in acceptance and commitment therapy for three clients with anorexia nervosa: What is corrective? In L. G. Castonguay & C. E. Hill (Eds.), Transformation in psychotherapy: Corrective experiences across cognitive behavioral, humanistic, and psychodynamic approaches (pp. 215-244). Washington, DC, US: American Psychological Association, xiii, 390 pp. DOI: 10.1037/13747-012
Hesser, H., Westin, V., Hayes, S. C., & Andersson, G. (2009). Clients’ in-session acceptance and cognitive defusion behaviors in acceptance-based treatment of tinnitus distress. Behaviour Research and Therapy, 47, 523–528. DOI: 10.1016/j.brat.2009.02.002 This study showed using transcript analysis that changes in client behavior in session predicted outcomes in an ACT RCT.
The Twohig/Hayes book “ACT Verbatim” (New Harbinger) applies what is in essence a coding system to some of the transcript analysis there.