50 male university students each participated in one of five film conditions. In all conditions subjects were provoked, exposed to communications, and then given an opportunity to retaliate against their tormentor. Subjects in Condition 1, the control, viewed 150 sec. of a neutral film as opposed to 150 sec. of a violent film viewed in Conditions 2 through 5. Retaliation was delayed in Conditions 3, 4, and 5 by appending 100, 200, or 300 sec., respectively, of the neutral film of the control to the violent film viewed in these conditions. Postcommunication aggression was significantly greater than the control in Conditions 3 and 4 only
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