This document provides details of a proposed research study that would investigate the relationship between positive self-concept and self-image anxiety in adolescents with neurofibromatosis type 1 (NF1). The study would use a within-subjects design with random assignment to treatment and control groups. Participants would complete assessments of self-concept and self-esteem before and after a 12-week computerized self-concept training treatment. The goal is to see if the treatment can moderately reduce self-image anxiety and compare the treatment effect based on disease severity.