A selectionist theory states that violence by males toward male peers origi
nally served specific functions and violence to female peers served others.
Differences in self-reported victimization and perpetration in studies of
1,452 high school students were hypothesized. In Study 1, male-to-male aggr
ession was reported to be more prevalent than male-to-female aggression. Fo
r male-to-male aggression, perpetrator reports agreed with or exceeded vict
im reports, and victims were more often strangers than close friends. In co
ntrast, for male-to-female aggression, there were consistently fewer report
s from perpetrators than from victims, and victims were less often stranger
s than girlfriends. Study 2 obtained similar findings for reported frequenc
y, number of victims and perpetrators, and sexual aggression. Study 3 showe
d that girls' aggression contrasted with that by boys with respect to intra
- versus intersex aggression and perpetrator-victim agreement.