Schutte, N. S., Malouff, J. M., Post-Gorden, J. C., & Rodasta, A. L. (1988). Effects of playing videogames on children’s aggressive and other behaviors. Journal of Applied Social Psychology, 18 (5), 454-460.

Abstract:  31 children (aged 5-7 yrs) were matched on sex, randomly assigned to play either a violent (karate) videogame or a nonviolent (jungle vine swinging) videogame, and then observed during free play. The main results were that Ss who had played the jungle swing videogame later played more with a jungle swing toy and that Ss who played the violent videogame later showed more aggression. Findings are interpreted as an indication that young children who play videogames later tend to act similarly to how their videogame character acted. (PsycINFO Database Record (c) 2004 APA, all rights reserved)