Examines three factors that may place adolescents at risk for aggression and violence: personality, affect, and family. Using a sample of male adolescents at risk for violence, a cluster analysis was conducted to categorize these adolescents in terms of personality characteristics. Concludes that, among male delinquents, elevated psychopathology is associated with higher anger and anxiety, but not higher family control. (Contains 29 references and 3 tables.) (GCP)