Enhancing psychotherapy for bulimia nervosa and binge eating disorder

INTERVENTION: CBT‐B (Beck); CBT‐S (Schema focused); CBT‐A (Appetite enhanced). Duration: 12 months. CONDITION: Binge eating disorder Bulimia nervosa and binge eating disorder PRIMARY OUTCOME: Binge eating (frequency of binges per week) To examine whether it is possible to improve the outcome of BN and BED treatment by enhancing cognitive component of standard CBT. Standard CBT will be compared with two enhanced forms of CBT ‐ schema therapy and nutrition and appetite enhanced CBT. To examine whether it is possible to improve the outcome of BN and BED treatment by enhancing the nutritional component of standard CBT. Standard CBT will be compared with two enhanced forms of CBT ‐ schema therapy and nutrition and appetite enhanced CBT. SECONDARY OUTCOME: i) Recovery, defined as abstinence from binging, purging and the absence of any eating disorder diagnosis ii) Clinician‐rated EDE subscales (sum): Restraint, bulimia, eating concerns, weight concerns, shape concerns iii) Clinician‐rated: Global Assessment of Functioning, Axis V of DSM‐IV iv) Weight v) Number of days per week on which binge eating occurs vi) Cliinician‐rated: Global Eating Disorder Status vii) Eating disorder symptoms: number of purges, dietary restriction viii) Self‐report: EDI subscales: Drive for Thiness, Body Dissatisfaction, Bulimia. INCLUSION CRITERIA: i) current primary diagnosis of BN or BED; ii) Body mass index (BMI) > 17.5.