 Assessments occur at study start, at the end of treatment, and at a 3-month follow-up. Assessments include height and weight measurements and measurements of changes in exercise- and nonexercise-related activity. All participants are given tests and interviews to assess eating disorder symptoms, depression, psychoactive substance abuse and dependence, and functioning. Patients complete self-report questionnaires to assess their cognitive restraint, hunger, disinhibition, strength of urges to binge, and degree of confidence in their ability to resist a binge. Patients also rate the suitability of treatment both prior to and following completion of the intervention. 