In this report, Crick and Gropeter argue that up until now, little research has been done on girls’ aggression, thus leading many to believe that boys are more aggressive. This research, if anything, they say, is reflective of a lack of research on forms of aggression relevant to girls rather than an actual gender difference in overall levels of violence. Crick and Gropeter thus propose a notion of relational aggression, typical of girls, and provide an assessment of overt aggression and social-psychological adjustment.