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An experiment with 351 second through sixth graders was conducted to determine the effectiveness of an active mediation strategy: encouraging children to focus on the feelings of the victim of violence in a cartoon. Although boys who watched the cartoon without the mediation were more aggression-prone after viewing than a control group, boys who received the mediation did not show an increase in aggressive tendencies. Neither the cartoon nor the mediation affected girls' aggression-proneness.
Nathanson et al. (Wed,) studied this question.