The study examined if the relationship between change in attachment insecurity and target symptom outcomes was moderated by treatment type. Women (N = 66) with binge eating disorder (BED) were randomly assigned to two treatment types: group cognitive-behavioral therapy (GCBT) or group psychodynamic-interpersonal psychotherapy (GPIP). Results indicated significant positive pre- to posttreatment changes in all attachment insecurity scales, but no difference between GCBT and GPIP on these changes. Change in attachment anxiety was related to improved depression for women completing GPIP, but not for women completing GCBT. This indicated a moderating effect of treatment type in explaining the relationship between change in attachment anxiety and improved depression. Changes in attachment anxiety may be important for symptom outcomes related to psychodynamic-interpersonal therapies. (PsycINFO Database Record (c) 2010 APA, all rights reserved).