Giumetti, G., & Markey, P. (2007, December). Violent video games and anger as predictors of aggression. Journal of Research in Personality, 41(6), 1234-1243. Retrieved June 27, 2009, doi:10.1016/j.jrp.2007.02.005

Considerable research has demonstrated that playing violent video games can increase aggression. The theoretical framework upon which a good deal of this research has rested is known as the General Aggression Model (GAM; [Anderson, C. A., & Bushman, B. J. (2002). Human aggression. Annual Review of Psychology, 53, 27-51]). The current study tested an assumption of the GAM by examining if the dispositional trait of anger moderated the relation between violent video games and aggression. A total of 167 undergraduate students (79 females, 88 males) first completed a measure of anger and were then randomly assigned to play either a non-violent or violent video game. After the video game play period, participants completed ambiguous story stems in order to assess aggression. Consistent with predictions of the GAM, anger significantly moderated the effect of video game violence on aggression. Specifically, participants who were angry were more affected by violent video games than participants who were not angry. (PsycINFO Database Record (c) 2008 APA, all rights reserved)(from the journal abstract)