“…Studies that examined the relationship between cohesiveness and subjective ratings of improvement have generally shown a weak but positive link. Significant positive correlations have been found between cohesiveness and self-reported improvement (Kivlighan & Lilly, 1997;Yalom, Houts, & Zimerberg, 1967), self-perceived personality change (Kapp et al, 1964;Lieberman et al, 1973), self-esteem (Falloon, 1981), and self-reports of the extent to which patients "gained from the group" (Wright & Duncan, 1986, p. 490). However, when more objective indices of patient outcomes are used (e.g., therapist evaluation, psychiatric interviews, standardized measures of clinical symptoms), the evidence is less clear.…”