Clinical Research: Psychotherapy

The Evidence Base

Below you will find clinical research on the effectiveness of the psychotherapy models that Intermind uses for Single-Session Therapy (SST), Brief Therapy, and Progressive Therapy.

Single-Session Therapy (SST): Producing Significant Outcomes within One Session

  • Ewen, Mushquash, Bailey, Haggarty, & Stones. (2018). Single-session therapy in outpatient mental health services: examining the effect on mental health symptoms and functioning. Social Work in Mental Health, 16(5), 573–589. https://doi.org/10.1080/15332985.2018.1456503
  • Perkins, R. (2006). The effectiveness of one session of therapy using a single-session therapy approach for children and adolescents with mental health problems. Psychology and Psychotherapy: Theory, Research and Practice, 79(2), 215–227. https://doi.org/10.1348/147608305X60523
  • Perkins, R., & Scarlett, G. (2008). The effectiveness of single session therapy in child and adolescent mental health. part 2: an 18-month follow-up study. Psychology and Psychotherapy, 81(Pt 2), 143–56. https://doi.org/10.1348/147608308X280995
  • Perreault, K., Breton, M., & Berbiche, D. (2023). An innovative model of psychological service delivery in primary healthcare: the single-session intervention. Bmc Primary Care, 24(1). https://doi.org/10.1186/s12875-022-01949-8
  • Vanessa, B., Giulia, F., Claudia, T., Flavio, C., Valentina, G., Emanuele, M. G., Gianluca, C., & Giada, P. (2021). Single-session therapy by appointment for the treatment of anxiety disorders in youth and adults: a systematic review of the literature, 12. https://doi.org/10.3389/fpsyg.2021.721382

Brief Therapy: Producing Significant Outcomes within 2-10 Sessions

Solution-Focused Brief Therapy (SFBT)

  • Gingerich, W. J., & Peterson, L. T. (2013). Effectiveness of solution-focused brief therapy: A systematic qualitative review of controlled outcome studies. Research on Social Work Practice, 23(3), 266-283. http://dx.doi.org/10.1177/1049731512470859
  • Further Clinical Research: PubMed

Brief Interpersonal Psychotherapy (IPT-B)

  • Swartz, H. A., Frank, E., Shear, M. K., Thase, M. E., Fleming, M. D., & Scott, J. (2004). A pilot study of brief interpersonal psychotherapy for depression among women. Psychiatric Services, 55(4), 448-450. https://doi.org/10.1176/appi.ps.55.4.448
  • Further Clinical Research: PubMed

Motivational Enhancement Therapy (MET)

  • Lenz, A. S., Rosenbaum, L., & Sheperis, D. (2016). Meta-analysis of randomized controlled trials of motivational enhancement therapy for reducing substance use. Journal of Addictions & Offender Counseling, 37(2), 66–86. https://doi.org/10.1002/jaoc.12017
  • Further Clinical Research: PubMed

Motivational Interviewing

  • Smedslund G, Berg RC, Hammerstrøm KT, Steiro A, Leiknes KA, Dahl HM, Karlsen K. Motivational interviewing for substance abuse. Campbell Systematic Reviews 2011:6. https://doi.org/10.4073/csr.2011.6
  • Further Clinical Research: PubMed

Chairwork Psychotherapy

  • Pascual-Leone, A., & Baher, T. (2023). Chairwork in individual psychotherapy: Meta-analyses of intervention effects. Psychotherapy, 60(3), 370–382. https://doi.org/10.1037/pst0000490

Focused Acceptance & Commitment Therapy (FACT)

  • Glover, N. G., Sylvers, P. D., Shearer, E. M., Kane, M.-C., Clasen, P. C., Epler, A. J., Plumb-Vilardaga, J. C., Bonow, J. T., & Jakupcak, M. (2016). The efficacy of Focused Acceptance and Commitment Therapy in VA primary care. Psychological Services, 13(2), 156–161. https://doi.org/10.1037/ser0000062

Progressive Therapy: Producing Significant Outcomes within 11 – 20 Sessions

Acceptance & Commitment Therapy (ACT)

Clinical Research:

Interpersonal Psychotherapy (IPT)

Clinical Research:

Schema Therapy

Clinical Research:

Gestalt Therapy

Emotion-Focused Therapy (EFT)

Cognitive Behaviour Therapy (CBT)

Clinical Research: PubMed

Positive Psychology

Clinical Research: PubMed

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