Rapid Response to Day Hospital Treatment in Bulimia Nervosa and Purging Disorder

The CBT intervention is a 4 session (1 hour each) individual psychotherapy intervention that uses a manualized treatment protocol developed by the investigators. It uses standard CBT for eating disorders interventions, including orientation to the CBT model, psychoeducation, commitment and goal setting, behavioral strategies for normalizing eating and reducing bulimic symptoms, planning, and homework. 1-2 sessions are delivered before starting day hospital treatment, and the remaining sessions are delivered in the first weeks of day hospital.

The MI intervention is a 4 session (1 hour each) individual psychotherapy intervention that uses a manualized treatment protocol (Carter \& Bewell-Weiss, 2012). It uses standard MI for eating disorders interventions, including decisional balance, exploring values, readiness and confidence rules, and MI communication strategies. 1-2 sessions are delivered before starting day hospital treatment, and the remaining sessions are delivered in the first weeks of day hospital.