Source one:

As was noted earlier, the majority of computer games produced today have violence as their

principal theme. Despite the growing concerns of parents and teachers in the past decade, it

would appear from my research that violence in computer games is becoming increasingly

realistic and explicit. We are thus faced with the familiar question: Does playing violent

computer games lead to aggressive behavior in young people? This is clearly a highly complex

issue. Research conducted in the past decade has revealed that young people who regularly play

violent computer games have a tendency to be more aggressive than those who do not. Perhaps

not surprisingly, my findings tend to support this position. (extracted from p. 116)

Walker, A. (2001). Computer games and adolescent aggression. In N. Peters (Ed.), Research into

the effects of computer games (pp. 108-124). London: St Martin’s Press.

Source four:

Popular activities of any sort can be addictive. Some people are addicted to sport, and some to

television, for example. Both these examples, and many others, can be harmful to one's health

and social life if done too much. In addition, the quality of a computer game is an important

factor that may cause people to play it a lot, in fact, some players think that a good computer

game should be addictive.

Smith, A. J. (2003). Synthesis. Retrieved October 20, 2008 from The Hong Kong Polytechnic

University, The English Language Centre Web site:

http://elc.polyu.edu.hk/CILL/eap/synthesis.htm

My opinion (synthesis):

In my opinion, computer games can cause the person to be quite violent(Walker, A. 2001), but just with their friends and it`s not a real violence, it`s just some plays involving emotion because of the little violence (Smith, A. J. 2003).  If computer and video games would cause people to kill each other, the world definetly had turned into chaos already. Around 90 percent of boys and 40 percent of girls are gamers, so we can conclude that video games may excite violence, but a person would hardly kill because of the video game`s  incentive.