Baron, R. A. (1974). Aggression as a function of victim’s pain cues, level of prior anger arousal, and exposure to an aggressive model. Journal of Personality and Social Psychology, 29 (1), 117-124.

Abstract:  Examined the hypothesis that pain cues from an apparently suffering victim would serve to inhibit further attacks against this individual under conditions where aggressors had not been subjected to prior anger arousal, but would fail to exert such effects, or actually tend to facilitate later aggression, when aggressors had previously experienced strong provocation. Ss were 84 undergraduate males. Results obtained with 2 different dependent measures support the hypothesis. It was also predicted that any aggression-restraining influence of victim’s pain cues would be markedly reduced by exposure to the actions of an aggressive model who completely ignored such feedback. No evidence was obtained for this suggestion. Findings are discussed in terms of the potentially important role of vicarious emotional arousal in determining the reactions of aggressors to signs of pain and discomfort on the part of their victims. (22 ref) (PsycINFO Database Record (c) 2004 APA, all rights reserved)