This study compared adolescent child molesters (n = 31) with nonsex offending delinquents (n = 34) and normal adolescents (n = 71) on standardized measures of social competence and psychological adjustment. The measures included the Adolescent Assertiveness Scale, the Survey of Heterosocial Interactions, the Self-Consciousness Scale, the Social Anxiety and Distress Scale, the Revised UCLA Loneliness Scale, the Coopersmith Self-Esteem Inventory, the Beck Depression Inventory, the Norwicki-Strickland Locus of Control Scale, and the Jesness Inventory. Results were consistent with predictions. Molesters showed significantly more global maladjustment than normals and were more socially anxious and threatened by heterosocial interactions than nonsex offending delinquents. A discriminant function analysis suggested that molesters, more than delinquents, were likely to perceive themselves as socially inadequate and to be externally oriented in their attributional style. Results support the hypothesis that social skill deficits and social isolation are risk factors that may predispose some adolescents to commit sexual crimes against children. © 1990.