 In the face of scant literature on the subject, the investigators aim to more clearly identify effective treatments for adolescent bulimia nervosa BN through a treatment study comparing two current treatments Cognitive Behavioral Therapy for Adolescents, CBT-A and Family Based Therapy for Bulimia Nervosa, FBT-BN for the disorder in comparison with a non-specific therapy, Supportive Psychotherapy for Adolescent Bulimia SPT. Additionally, the investigators hope to provide clinicians with information on treatment efficacy, variables that might influence outcome, and processes that may affect treatment efficacy that will guide them in their efforts to treat adolescent BN. 