Hapkiewicz, W. G., & Roden, A. H. (1971). The effect of aggressive cartoons on children’s interpersonal play. Child Development, 42, 1583-1585.

Abstract:  Randomly assigned 30 male and 30 female 2nd graders in same sex pairs to 1 of 3 treatment groups: aggressive cartoon, nonaggressive cartoon, and no cartoon. Results indicate no difference among the groups on measures of interpersonal aggression, although boys exhibited significantly more aggression than girls (p < .05). Although boys also demonstrated more prosocial behavior (sharing) than girls, boys who viewed the aggressive cartoon performed this response at a reduced rate (p < .05). (PsycINFO Database Record (c) 2004 APA, all rights reserved)