Previous studies show that men endorse instrumental beliefs about aggressio
n to a greater extent than women, whereas women endorse expressive beliefs
to a greater extent than men. However, men and women indicate that they hav
e different opponents in mind when thinking about aggression, and existing
measures may emphasize physical forms of aggression. Therefore, beliefs abo
ut aggression were examined when the type of aggression (physical or verbal
) and the sex of the opponent (same sex or opposite-sex partner) were speci
fied, among a sample of 200 students. Expressive beliefs were higher and in
strumental beliefs lower for an opposite-sex partner and for physical aggre
ssion. The characteristic sex difference applied across all manipulations f
or expressive beliefs, but not for instrumental ones: men showed higher sco
res than women only for same-sex physical aggression. Higher instrumental (
but not lower expressive) scores were also found among those who based thei
r responses on real rather than hypothetical events. The sex difference in
instrumental beliefs for same-sex physical aggression was largely confined
to respondents using a hypothetical event. As in previous studies, instrume
ntal and expressive beliefs were relatively independent of one another. The
position that the beliefs represent rhetorical devices is assessed in the
light of these findings.