Olson, C. K., Kutner, L. A., Baer, L., Beresin, E. V., Warner, D. E., & Nicholi, A. (2009). M-rated video games and aggressive or problem behavior among young adolescents. Applied Developmental Science, 13(4), 188-198. doi:10.1080/10888690903288748

This research examined the potential relationship between adolescent problem behaviors and amount of time spent with violent electronic games. Survey data were collected from 1,254 7th and 8th grade students in two states. A “dose” of exposure to Mature-rated games was calculated using Entertainment Software Rating Board ratings of titles children reported playing “a lot in the past six months,” and average days per week of video game play. Analyses were conducted using simultaneous logistic regression for binary outcome variables, and simultaneous multiple linear regression for continuous outcome variables, controlling for a series of potential confounders. M-rated game dose predicted greater risk for bullying (p < .01) and physical fights (p < .001), but not for delinquent behaviors or being a victim of bullies. When analyzed separately, these associations became weaker for boys and stronger for girls. (PsycINFO Database Record (c) 2012 APA, all rights reserved)