An experiment was conducted to study the effects of model reinforcement on imitative aggression in children. The subjects - 20 boys and 20 girls from a kindergarten class - were randomly assigned to one of jour (three experimental and one control) groups. In the experimental groups,
the subjects were shown a movie in which a male model received different amounts of social praise for playing in an aggressive manner. In the control group, the subjects were not given any exposure to the movie, and thus the model. The subjects from each of these groups were then given access
to a free-play situation. In accordance with social learning theory, the results showed that the number of imitative aggressive responses increased as a function of the amount of praise given the model. The data also showed that boys exhibited more imitative aggressive behaviors than girls.