Wiegman, O., & van Schie, E. G. M. (1998). Video game playing and its relations with aggressive and prosocial behaviour. British Journal of Social Psychology, 37 (3), 367-378.

Abstract:  In this study of 278 10-14 yr old 7th and 8th graders from 5 elementary schools in Enschede, The Netherlands, the relationship between the amount of time children spent on playing video games and aggressive as well as prosocial behavior was investigated. In addition, the relationship between the preference for aggressive video games and aggressive and prosocial behavior was studied. No significant relationship was found between video game use in general and aggressive behavior, but a significant negative relationship with prosocial behavior was supported. However, separate analyses for boys and girls did not reveal this relationship. More consistent results were found for the preference for aggressive video games: children, especially boys, who preferred aggressive video games were more aggressive and showed less prosocial behavior than those with a low preference for these games. Further analyses showed that children who preferred playing aggressive video games tended to be less intelligent. (PsycINFO Database Record (c) 2004 APA, all rights reserved)