Keywords Bulimia Nervosa, cognitive behavior, treatment Abstract Cognitive-behavioral therapy (CBT) for bulimia nervosa (BN) has received consid- erable empirical support for its efficacy. However, few investigators have examined the mechanisms proposed to account for the reduction of BN symptoms during CBT. The current study examined the associations between therapist interventions, client mechanisms, and symptoms during treatment in a sample of 56 clients under- going CBT for BN.