In evaluating these results, one must realize that the aggressiveness we measured was heavily weighted toward physical aggression. Our assessments at each time point include general measures of aggressiveness (peer nominations and MMPI scales), but from adolescence onward also include specific measures of physical aggression. Further, our peer-nomination inventory, through broad, mainly includes items tapping overt and direct expressions of aggressive behavior more common among males. Across ages, males typically are found to be more physically aggressive than females, and even if females display these aggressive behaviors, they may be more likely to be subjected to environmental responses that socialize physical aggression out of their behavioral repertoire [Eron and Huesmann, 1989].
