Adolescent females are committing an increasing number of violent interpersonal acts. This study used the qualitative technique of focus group interviews to explore social control and self-control factors which impact such behaviors. Forty-seven girls aged 10-18 years described situations and events where interpersonal violence might be used and also what might prevent such acts. For the girls interviewed, social controls were the predominant means of controlling the use of interpersonal violence. Family and peer groups were the most powerful social controls, whether positive or negative. Self-control was deemed important but most girls lacked either the skills or desire to engage in self-control. Violence prevention programs need to teach techniques for improving self-control and increasing self-concept to be most effective.