The goal of this project is to conduct a large randomized controlled trial of a selected obesity prevention program that reduced risk for future onset of obesity over a 2-year follow-up and decreased bulimic symptoms and negative affect in a preliminary trial (N = 188). The Healthy Weight program targets female adolescents with body image concerns because they are a group at high risk for obesity onset. We propose to focus on body-dissatisfied females during the first year of college because this is a particularly high-risk developmental period for weight gain (Butler, Black, Blue, & Gretbeck, 2004; Hovell, Mewborn, Randle, & Fowler-Johnson, 1985). This intervention utilizes persuasion principles from social and clinical psychology (e.g., strategic self-presentation, motivational interviewing) to increase the likelihood that participants will make behavioral changes. This study consists of two components: