Participants in this open-label study will be randomly assigned to receive one of two types of therapy: family-based therapy or ego-oriented individual psychotherapy. Both types of therapy will be given for a total of 24 hours over the course of 12 months. Physical and psychological assessments will be completed during study visits at baseline, immediately post-treatment, six months post-treatment, and one year post-treatment. Amount of weight gain will be evaluated, along with changes in weight and body shape concerns, as measured by the Eating Disorder Examination.