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Cohesion in group therapy: A meta-analysis.
Abstract
Cohesion is the most popular of the relationship constructs in the group therapy literature. This article reviews common definitions of cohesion, the most frequently studied measures, and a measure that may clarify group relations using two latent factors (quality and structure) to explain common variance among frequently used group relationship instruments. We present the results of a meta-analysis examining the relation between group cohesion and treatment outcome in 55 studies. Results indicate that the weighted aggregate correlation between cohesion and treatment outcome was statistically significant, r = .26, z = 6.54 (p < .01), reflecting a moderate effect size (d = .56). Heterogeneity of effect sizes was significant (Q = 260.84, df = 54, p < .001) and high (I2 = 79.3%), supporting moderator analyses. Six moderator variables were found to significantly predict the magnitude of the cohesion-outcome association (type of outcome measure, leader interventions to increase cohesion, theoretical orientation, type of group, emphasis on group interaction, and dose or number of group sessions). Patient contributions, diversity considerations, and evidence-based therapeutic practices are highlighted. (PsycINFO Database Record (c) 2018 APA, all rights reserved).
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“Offering a therapeutic treatment program in a group, provided that the group dynamics are used adequately, has been found to strengthen the result of the treatment (Burlingame et al., 2018).”
From A Novel Psychological Group Intervention Targeting Appearance-Related Distress Among People With a Visible Disfigurement (Inside Out): A Case Study (2023) · cites this paper as Burlingame et al., 2018
In the citing paper
“Variance in therapists’ ability to form an effective therapeutic alliance70 and variance in group cohesion69,71 have been offered as common factors that might underlie these effects.”
From A common factors perspective on mindfulness-based interventions (2022) · cites this paper as [71]
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“Cohesion, in part, represents trust existing within group members’ interpersonal relationships (Burlingame et al., 2018), and cohesiveness is mediated in an ongoing process of building trust between group members (Yalom & Leszcz, 2005).”
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Exploring mechanisms of change in the metacognitive training for depression
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“Thus, future studies may use a revised version of the pre-and post-session questionnaires that (1) assess the dysfunctional beliefs targeted in the modules more specifically, (2) have more items, and (3) capture general mechanisms of change in group psychotherapy (e.g., group cohesion) ([36].”
Vezmar, M., Ćirović, N., Sudar, B., Buzejić, J., Jovanović, T., Radanović, A., & Vezmar, M. (2024) · The Arts in Psychotherapy · doi:10.1016/j.aip.2024.102150 · Cited by 6
Drabarek, D., Hammond, R., Mitchell, M. L., Colton, H., Dean, J. G., Stirling, K., Wainwright, L., Davies, S. R., Haarsma, S., Puckett, C., et al. (2022) · Digital Health · doi:10.1177/20552076221129733 · Cited by 2
“Similarly, a feature of on-going group counselling crucial to its acceptability and effectiveness is the cohesion that develops between group counselling recipients.(42) Thus, subheadings under each mechanism reflect our findings by each relationship type, between clinicians, caregivers and teachers.”
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“Results from meta-analyses by Burlingame and colleagues showed that group cohesion is linked to positive client outcomes for clients even after controlling for age, gender, diagnosis, and treatment setting (Burlingame et al., 2011, 2018).”
BackgroundMethodResultInfluentialResistances to online group analysis – Is there anything new under the sun?
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“In addition, groups with more sessions and therefore more time to foster group cohesion, which in turn results in increased positive outcomes for the client (Burlingame et al., 2018).”
BackgroundInfluentialSeddon, J. A., Reaume, C. L., & Thomassin, K. (2025) · BMC Psychiatry · doi:10.1186/s12888-024-06382-y · Cited by 3
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BackgroundWang, K., Brownstone, L. M., & Kivlighan, D. M. (2024) · Psychotherapy Research · doi:10.1080/10503307.2024.2385399 · Cited by 2
“with literature that has long established a robust relationship between group cohesion and treatment outcome (Burlingame et al., 2018), our findings demonstrated a positive relationship between actor and partner perceptions of cohesion and a group member’s motivation.”
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“Numerous studies have shown that group therapy is equally as effective as individual therapy, particularly in the treatment of depression (Burlingame et al., 2018; Fawcett et al., 2020; Troesken & Renneberg, 2019).”
Уэтова, Е., Hederman, L., Ross, R., Oppezzo, M., & O’Sullivan, D. M. (2025) · CHI Conference Extended Abstracts on Human Factors in Computing Systems (CHI EA) · doi:10.1145/3706599.3719818 · Cited by 2
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“In their meta-analysis, Burlingame et al. ( 2018 ) identified group cohe - sion as a meaningful predictor of psychotherapy outcomes in general, and depression in particular for adults, across a wide range of therapeutic approaches, including cognitive behavior therapy.”
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“Burlingame et al., in their meta-analysis on the impact of group cohesion on patients’ outcomes, found that groups with greater trust, bonding and sense of unity tend to have better patient improvement regardless of the kind of therapy (Burlingame et al., 2018).”
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Lange, A. M. C., Stapley, E., Merrick, H., & Hayes, D. (2024) · British Journal of Educational Studies · doi:10.1080/00071005.2024.2336505 · Cited by 2
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Pagoto, S., Lueders, N., Palmer, L., Idiong, C. I., Bannor, R., Xu, R., & Ingels, J. S. (2024) · JMIR Formative Research · doi:10.2196/58627 · Cited by 2
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BackgroundMalát, J., Cheng, S. E. T., & Tay, A. T. S. (2024) · Springer eBooks · doi:10.1007/978-3-030-51366-5_37 · Cited by 2
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Sousa, J., Raja, P. V., Rabinowitz, M., Richard, J. V., Smith, A., Huskamp, H. A., Mehrotra, A., Busch, A. B., & Uscher‐Pines, L. (2024) · Psychiatric Services · doi:10.1176/appi.ps.20240058 · Cited by 2
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“Perceived cohesion represents a personal assessment of their connection within a group (Greer, 2012; Burlingame et al., 2018).”
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“Similarly, cohesiveness has been linked to positive outcomes in numerous studies (Burlingame et al., 2011, 2018; Marmarosh et al., 2005).”
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“…of psycho-dynamic group therapy are believed to predict positive outcomes and are conceptually similar to Yalom’s “curative factors,” which are widely accepted as corresponding to important mechanisms of change in group therapy (Burlingame et al., 2018; Kösters et al., 2006; Yalom & Leszcz, 2005).”
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“There is strong evidence supporting the impact of group cohesion (Burlingame et al., 2018), leader alliance (Alldredge et al., 2021), and effective outcome across many issues including depression, anxiety, trauma, personality disorders, and substance abuse (see Burlingame & Strauss, 2021 for a…”
Shapiro, I., Boyd, J. E., McCabe, R. E., & Rowa, K. (2025) · Behavioural and Cognitive Psychotherapy · doi:10.1017/s1352465825000013 · Cited by 2
“…meta-analytic and systematic reviews have demonstrated that group cohesion is reliably related to and predictive of treatment outcomes both across psychotherapy approaches and diagnostic categories (Burlingame et al ., 2018) as well as in CBT for anxiety and related disorders (Luong et al ., 2020).”
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“In member-to-group contexts, group leader interventions act as an important moderator, while interactions are critical to member-to-member relationships (Burlingame et al., 2018).”
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“…in use of GQ in clinical practice, and the following two studies demonstrate that continuous feedback to therapists on patients’ experience of group relationships resulted in significantly better treatment outcomes and fewer premature terminations (Burlingame et al., 2018; Gleave et al., 2017).”
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“Thus, they didn’t achieve a good enough group cohesion (Burlingame et al., 2018).”
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“As another example, the overall level of cohesiveness between members in a therapy group predicts individual-level treatment outcomes for the individuals in that group (Burlingame et al., 2018).”
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“Furthermore, it has been posited that stronger cohesion tends to emerge when group leaders promote an emotionally secure and collaborative safe space for feedback and support (Burlingame et al., 2018).”
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“…therapeutic settings; for example, facilitators noted an absence of opportunities for rapport-building between facilitators and participants and among participants themselves, which is consistent with treatment approaches that emphasize the importance of therapeutic alliance and cohesion [1, 12].”
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“Moderators could also be trained to facilitate group cohesion (sense of belonging, influence, mutual support, and identification with other group members [101,219]), which has been associated with better outcomes in professionally led support groups [220].”
Wuthrich, V. M., Huang-Smith, T., Rapee, R. M., Kangas, M., & Jones, M. (2026) · Cognitive Therapy and Research · doi:10.1007/s10608-025-10703-0 · Cited by 1
Hernández, R., Solai, K., Kwon, S., Venkatesan, P., Fast, D., Lara-Cinisomo, S., & Nisar, H. (2026) · Frontiers in Digital Health · doi:10.3389/fdgth.2026.1766741 · Cited by 1
“Furthermore, when it comes to format, evaluation should include feasibility and retention patterns; when group-based delivery is used, group process indicators (e.g., attendance, interaction quality/cohesion, and facilitator fidelity) should also be assessed (86).”
O'brien, S., Boulanger, G., Yahalom, J., Bhatt-Mackin, S. M., & Goodman, M. S. (2026) · Frontiers in Psychiatry · doi:10.3389/fpsyt.2026.1763407 · Cited by 1
“Group cohesion is the best nonspeci fi c factor to explain positive outcomes in group psychotherapy – it is analogous to the treatment alliance in individual therapy (65).”
Carfagno, M., Martinelli, F., Laboccetta, V., Leone, G., Costantini, A., Patriciello, G., Ruzzi, V., Raffone, F., Barone, E., & Monteleone, A. M. (2026) · Journal of Eating Disorders · doi:10.1186/s40337-026-01684-w · Cited by 1
“…group cohesion—defined as the sense of belonging, trust, and emotional connection among group members—has been consistently identified as a central therapeutic process in group psychotherapy and has been associated with improved treatment outcomes across different clinical populations [19].”
The Group-Leader Self-Assessment (GLSA) Tool: Preliminary Study of Reliability and Validity
Barnes, M. A., Schwartzberg, S. L., Bedell, G. M., Counselman, E. F., & Marfeo, E. E. (2020) · The Journal for Specialists in Group Work · doi:10.1080/01933922.2020.1799466 · Cited by 1
CBT Meets Process: Assimilative Integration with Reference to Group Psychotherapy
Greene, L. R. (2024) · International Journal of Group Psychotherapy · doi:10.1080/00207284.2024.2323613 · Cited by 1
“…linked to task achievement have been assessed by such measures as the “Engagement” scale of the Group Climate Questionnaire, the “Positive Working” scale of the Group Questionnaire (cf. Miles et al., 2023) and measures of cohesion and alliance (Burlingame & Strauss, 2021; Burlingame et al., 2018).”
MethodResultSmoker, M. P., Weinstock, J., Marriott, B. R., Aalsma, M. C., & Adams, Z. W. (2024) · Journal of Substance Use and Addiction Treatment · doi:10.1016/j.josat.2024.209589 · Cited by 1
Katan, A., Carter, J., & Kelly, A. C. (2025) · British Journal of Clinical Psychology · doi:10.1111/bjc.12542 · Cited by 2
“The alliance individuals form with a therapist and their peers in a group treatment context is considered to be a critical mechanism of change in psychotherapy (Baier et al., 2020; Burlingame et al., 2018).”
Miller, M. L., & Berke, D. S. (2025) · Global Implementation Research and Applications · doi:10.1007/s43477-025-00171-9 · Cited by 1
Ippolito, T. A. (2019) · Alcoholism Treatment Quarterly · doi:10.1080/07347324.2019.1647772 · Cited by 1
Bieg, M., Roß, T., Bulla, J., Kluttig, T., & Fontao, M. I. (2020) · Frontiers in Psychiatry · doi:10.3389/fpsyt.2020.00409 · Cited by 1
Luong, H. K., Roberge, P., Provencher, M. D., Kilby, C. J., Drummond, S. P. A., & Norton, P. J. (2022) · Clinical Psychology & Psychotherapy · doi:10.1002/cpp.2740 · Cited by 1
Maher, R. (2024) · Queensland University of Technology · doi:10.5204/thesis.eprints.248933
Group Cohesion in Cognitive-Behavioral Therapy for Anxiety and Related Disorders
Carney, A. E., Kandasamy, K., Tsekova, V., Provost-Walker, O., Rowa, K., Elcock, A., McCabe, R. E., & Antony, M. M. (2025) · Cognitive Therapy and Research · doi:10.1007/s10608-025-10578-1 · Cited by 1
“…revealed that leader interventions to increase cohesion moderated the association between group cohesion and treatment outcome, such that studies that reported using strategies to build safety and group cohesion were associated with a stronger cohesion-outcome association (Burlingame et al., 2018).”
Wang, L., Yuwen, W., Cox, V. F., Chen, L., Zheng, H., Ning, Z., & Simoni, J. (2025) · AIDS and Behavior · doi:10.1007/s10461-025-04812-w
“Studies have shown that positive group dynamics—such as group cohesion, emotional bonding, and empathy—are associated with improved emotional functioning among group members in group therapy settings [ 81].”
Greene, L. R. (2019) · International Journal of Group Psychotherapy · doi:10.1080/00207284.2019.1614450
Doorn, K. A., Kealy, D., Ehrenthal, J. C., Ogrodniczuk, J. S., Joyce, A. S., & Weber, R. K. (2020) · The Journal of Nervous and Mental Disease · doi:10.1097/nmd.0000000000001176
“From a clinical perspective, individuals with higher levels of hopelessness as well as personality dysfunction may need an especially reliable feeling of affiliation with other group members (Burlingame et al., 2018) to benefit from group psychotherapy.”
BackgroundSinha, S., Porter, E. F., Leeper, E., & Owen, J. J. (2021) · Journal of Couple & Relationship Therapy · doi:10.1080/15332691.2020.1867686
“For example, group cohesion has been found to have an impact on treatment outcomes in group therapy in general (Burlingame et al., 2018), as well as in relationship satisfaction following relationship education interventions (Kivlighan et al., 2017; Owen et al., 2013).”
BackgroundBonnett, T. H., McCorquodale, L., & Schouten, K. R. (2021) · Journal of Community Psychology · doi:10.1002/jcop.22669
An Overview of Group Cognitive Behavioral Therapy: Science and Practice
Nowakowski, M. E., & Bieling, P. (2021) · Elsevier eBooks · doi:10.1016/b978-0-12-818697-8.00205-3
Bernaud, J.-L. (2021) · Dunod eBooks · doi:10.3917/dunod.berna.2021.01.0317
The influence of members’ attachment style on group cohesion in substance use therapy groups
Naeli, A., Skentzos, M., & Hronis, A. (2022) · Discover Psychology · doi:10.1007/s44202-022-00022-w
Addressing Insomnia Using Group CBT‐I
Spiegelhalder, K. (2022) · doi:10.1002/9781119891192.ch22
Ohno, P. M., de Jesus, R. S. M., Medeiros, H. M. D. F., & Teodoro, M. L. M. (2022) · Revista Brasileira de Terapias Cognitivas · doi:10.5935/1808-5687.20220006
“Fatores como coesão grupal, possibilidade de compartilhar as mesmas dificuldades do dia a dia e de criar vínculos sociais dão mais força ao tratamento (Burlingame et al., 2018).”
Kharrazi, N., Moffett, L. A., & Denduluri, M. S. (2022) · Elsevier eBooks · doi:10.1016/b978-0-323-91497-0.00116-8
Cobb, C. L., Martínez, C. R., Schwartz, S. J., & Montero‐Zamora, P. (2022) · Journal of Community Psychology · doi:10.1002/jcop.22977
Ash, K., Cawthorne, T., Crabtree, J. W., & Boddington, E. (2023) · FPID Bulletin The Bulletin of the Faculty for People with Intellectual Disabilities · doi:10.53841/bpsfpid.2023.21.1.17
Personalisierte Gruppenpsychotherapie
Strauss, B. M. (2023) · Ärztliche Psychotherapie · doi:10.21706/aep-18-2-127
Gruppenpsychotherapie zur Reduktion posttraumatischer Belastungssymptome
Rosendahl, J., Gawlytta, R., & Strauss, B. M. (2023) · Trauma und Gewalt · doi:10.21706/tg-17-2-92
Mentaliser les conflits en thérapie de groupe : détruire et survivre, au service de la cohésion
Cherrier, J.-F., Francisco, A., & Lahaie, F.-S. (2022) · Santé mentale au Québec · doi:10.7202/1098899ar
Malát, J., Cheng, S. E. T., & Tay, A. T. S. (2023) · Springer eBooks · doi:10.1007/978-3-030-42825-9_37-1
Examining a Cohesion-Focused Model in Experiential Growth Groups: A Single Case Research Design
Zhu, P., Liu, Y., & Xiong, Y. (2023) · The Journal for Specialists in Group Work · doi:10.1080/01933922.2023.2248635
“Interpersonally oriented groups with a size of five to nine members were found to show the strongest cohesion-outcome relationships (Burlingame et al., 2018).”
Background
Metadata
- Authors
- Burlingame, G. M., McClendon, D. T., & Yang, C.
- Affiliations
- Brigham Young University (US)
- Venue
- Psychotherapy
- Published
- 2018-12
- Volume
- 55
- Issue
- 4
- Pages
- 384-398
- ISSN
- 0033-3204 (ISSN-L)
- 1939-1536
- OpenAlex
- W2895900470
- Cited by
- 290
- References
- 96
- Citations by year
- 2026: 53 · 2025: 60 · 2024: 38 · 2023: 39 · 2022: 37 · 2021: 34 · 2020: 17 · 2019: 12
- FWCI
- 18.54
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Psychotherapy (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Social Sciences › Psychology › Clinical Psychology › Psychotherapy Techniques and Applications
- Social Sciences › Psychology › Clinical Psychology › Psychoanalysis and Psychopathology Research
- Social Sciences › Psychology › Social Psychology › Team Dynamics and Performance
- Keywords
- group cohesion, group therapy, treatment outcomes, group relations, group interaction, theoretical orientation, group types, patient diversity, evidence-based treatment
- MeSH terms
- Mental Disorders, Humans, Interpersonal Relations, Psychotherapy, Group, Treatment Outcome
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