Group Dynamics: Theory, Research, and Practice, Vol 29(1), Mar 2025, 55-65; doi:10.1037/gdn0000235
Objective: Prior research has established the significance of group cohesion in facilitating group outcomes, but few studies have clarified the similarities and differences between frequently used cohesion measures. This study compared the predictive effects of two practice-friendly group cohesion measurements on therapeutic factors, the Group Climate Questionnaire–Short Version (GCQ-S; MacKenzie, 1983) and the Group Entitativity Measure–Group Psychotherapy (GEM-GP; Hornsey et al., 2012), in 14-week positive psychology-informed structured psychoeducational groups. Method: Participants were 83 undergraduate students in 15 groups in an elective positive psychology course in a Chinese university. Participants completed self-report measures, and hierarchical linear models were conducted. Results: Both cohesion measures significantly and uniquely predicted therapeutic factors at the session level, including GCQ-Engagement (γ3j = .51, p 4j = .13, p 2j = .11, p p