During the last decade, attention and accusations within the media have turned more to the meteoric rise in popularity of arcade-type home computer and console games. Considerable anecdotal evidence abounds about how teenagers are affected by shoot-em-up and beat-em-up games. Zimbardo (1982) remarked that video games are so addictive to young people that they may be socially isolating and may actually encourage violence between people. Another comment came from the surgeon-general of the United States, who expressed his personal view that video games were one of the root causes of family violence in America. He was quoted as saying that children "are into the games, body and soul - everything is zapping the enemy. Children get to the point where when they see another child being molested by a third child, they just sit back" (Koop, 1982).
Because most research into television violence does demonstrate a relationship between the exposure to aggression and subsequently exhibited aggression, investigations of the effects of video game playing usually have predicted a similar relationship. However, many variables are involved, and researchers offer no clear statement on the role of game playing and aggressiveness. Parameters include, for instance, gender, age grouping, expressed hostility (feelings of aggressiveness) versus exhibited aggression (overt behavior), the behavioral measurement (e.g., toward a life-size doll, or in terms of shocks administered from an "aggression machine"), experimental duration of exposure (time spent playing), and personality traits. Also, studies may be laboratory based or observational.
I know these are reliable sources because there is an author and also research was done on the topic.
#2 This is my second article and it was written in 2010 and the title of it is Pediatrics for Parents. What makes the article reliable is the fact it’s only two years old. Here are some facts from the article.
References: Anderson, A, C. (2010, March 01). Violent Video Games and Other Media Violence, Part II. Pediatrics for Parents, (3/4), 21, Retrieved from http://elibrary.bigchalk.com.ezp-01.lirn.net Koop, E. (1982). Surgeon general sees danger in video games. New York Times, November 10th, p. A16. Dr. Phil (2012). Children and Violent Video Games, Retrieved from http://www.drphil.com/articles/article/297 American Psychology Association www.apa.org Scott, Derek (1995, March 01). The effect of video games on feelings of aggression... Journal of Psychology, ({129}) 121(12), Retrieved from http://elibrary.bigchalk.com.ezp-01.lirn.net Smith, Blake 9th grade (2006, August 17) How Video Games Affect Kids, Retrieved from http://rolemodels.jou.ufl.edu/rolemodels/entertainment/videogames.shtm