Change in attachment to the therapy group generalizes to change in individual attachment among women with binge eating disorder.

Attachment to groups is analogous to attachment to individuals, and may play an important role in group functioning and in group psychotherapy outcomes. This study examined whether attachment to the therapy group can change during treatment, and whether such change predicts improvements in treatment outcomes, including individual attachment, up to 1 year posttreatment. Eighty-seven women with binge eating disorder (BED) attended Group Psychodynamic Interpersonal Psychotherapy (GPIP). Participants were assigned to one of two conditions in which groups were homogeneously composed of women with either higher or lower individual attachment anxiety. Outcomes were assessed pre, post, 6 months, and 1 year posttreatment. Attachment to the group was assessed at weeks 4, 8, 12, and 16 of GPIP. Group attachment insecurity decreased significantly during treatment. Reductions in group attachment avoidance predicted decreases in individual attachment insecurity at 1 year posttreatment. Study condition did not moderate these associations. These results indicate that women with BED who receive GPIP are able to generalize improvements in group attachment security to their individual attachment relationships outside of therapy up to 1 year post group treatment.