Although a prevalence estimate of body dysmorphic disorder has been conducted with a college population, no research concerning the scope or dimensionality of the disorder had been conducted with an ethnically diverse sample of high school students. Consequently, the goals of this study were.to: (a) create a diagnostic questionnaire for body dysmorphic disorder that is both reliable and valid, and (b) utilize the questionnaire to assess the prevalence of body dysmorphic disorder and body image dissatisfaction in groups of Caucasian, African American, Asian, and Hispanic high school students. Differences in scores between ethnic groups indicated that African Americans hold an overall body image that is more positive that any other ethnic group. In addition, females demonstrated significantly higher scores than males on the Body Image Rating Scale (females were less satisfied with their physical appearance) .