Gentile, D. A., Anderson, C. A., & Olson, C. K. (2010). Do video games lead to violence?. In B. Slife (Ed.) , Clashing views on psychological issues (16th ed.) (pp. 327-341). New York, NY US: McGraw-Hill.
(from the chapter) Gentile and Anderson believe the research has made it clear that playing violent videogames leads to violent behavior. These researchers claim that several things happen when a child is playing violent games: an increase in physiological arousal, aggressive cognitions and emotions, aggressive behaviors, and decreased pro-social behaviors. These researchers also take on some of the more popular criticisms facing videogame research, such as the claim that violent video games only affect those who are already abnormally aggressive. Gentile and Anderson argue that this criticism is not valid because no group has ever been discovered to be totally immune from the effects of violent video games. Olson asserts that there is not a causal connection between violent videogames and violent behavior. In the second article, she summarizes several of her relevant research studies, including multiple qualitative and quantitative projects, a survey of over 1,000 middle school-aged children, and in-depth conversations with 42 youths in focus groups. While she allows that some individuals may have bad experiences with video games, she reports that playing such games, even violent ones, is a normal part of adolescent development. Indeed, they may even have pro-social and relationship-building consequences (PsycINFO Database Record (c) 2012 APA, all rights reserved)