Ellis, G. T., & Sekyra, F. (1972). The effect of aggressive cartoons on the behavior of first grade children. The Journal of Psychology, 81 (1), 37-43.

Abstract:  Assigned 51 Ss randomly selected from 3 1st grade classes, to 3 groups according to a randomized blocks technique based upon data gathered during 3 pretreatment observations recording the frequency of aggression in a natural classroom setting. The 1st group viewed a 5-min aggressive cartoon, the 2nd group viewed a 5-min neutral cartoon, and the 3rd group experienced a 5-min informal absence from the classroom. Posttreatment results indicate that Ss who viewed the aggressive cartoon emitted an increased number of aggressive behaviors when observed immediately after the treatment. It appeared that the Ss assigned to view the aggressive cartoon emitted behaviors in a hostile manner similar to the cartoon figures as suggested by a modeling theory of behavior. (PsycINFO Database Record (c) 2004 APA, all rights reserved)