To assess VRT (the amount of time a subject viewed a picture), a slide projector was used to present still images of models onto a 12-inch computer screen. Models were clothed, generally in swimsuits, and none were in sexual positions. Twenty-one stimulus categories, representing 21 potential sexual interests with approximately seven slides in each category, were viewed by the subject. Slides depicted Caucasian and African American males and females comprising preschool and school-age children, adolescents, and adults.