Cline, V. B., Croft, R. G., & Courrier, S. (1973). Desensitization of children to television violence. Journal of Personality and Social Psychology, 27(3), 360-365.

Abstract:  Exposed a total of 121 5-14 yr old boys with histories of high and low exposure to TV (and the violence therein) to a moderately violent film. Measures of autonomic response (skin conductance and blood volume pulse amplitude) were taken before and during their exposure to the violent film. Over both measures and in another replicated study, the high TV exposure Ss were significantly less aroused autonomically. This suggests a limited but still definite and measurable desensitization to filmed violence. Since the Ss had had either no exposure or no recent exposure to the particular film, results suggest the possibility of a generalizing effect for the desensitization that occurred. (25 ref.) (PsycINFO Database Record (c) 2004 APA, all rights reserved)