A group of male hospital attendants watched the knife-fight scene from the motion picture Rebel Without a Cause. A second, control, group watched an innocuous educational film. The group who watched the fight (the motion picture with aggressive content), and who were then required to run a conditioning experiment, punished errors more severely, using a significantly higher level of intensity of the punitive electric shock, than did the control group.
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Walters et al. (1962) studied this question.
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