Molitor, F., & Hirsch, K. W. (1994). Children’s toleration of real-life aggression after exposure to media violence: A replication of the Drabman and Thomas studies. Child Study Journal, 24 (3), 191-207.

Abstract:  Replicated 4 experiments by R. S. Drabman and M. H. Thomas (see PA, Vols 52:9879 and 56:2336; see also 1976; Thomas and Drabman [see PA, Vol 55:9513]) that showed that violent portrayals on TV have similar effects on children and desensitize children to real-life aggression. 21 male and 21 female 4th and 5th graders saw either a condensed version of the movie Karate Kid or Olympic competition scenes. Each S then was told to watch 2 children on a TV monitor (supposedly in an adjacent room) and get help if needed. The 2 children in the video subsequently became violent toward each other. Individual scores were obtained by subtracting the period of time that elapsed from the beginning of the video to the 1st display of violence from total number of seconds it took for each child to get help. Results confirm Drabman and Thomas’s finding; children tend to tolerate the aggressive behaviors of others more if they have first seen TV/film violence. (PsycINFO Database Record (c) 2004 APA, all rights reserved)