Anderson, Craig & Dill, Karen, 2000 states that there is a clear relation to increase aggression and violence when people play violent video games. They also state that in their experiment where they aloud students to play two type of games (Wolfenstein- a violent game and Myth- a non violent game) that when the students were being blasted or attacked by other students they was getting annoyed and aggressive as they allowed the students to pick a noise if they win a battle. The result from them was picking a noise lead to people who were losing making a louder noise when they eventually won.
However Jackson, Paul 2007 thinks that the gaming industry is often blamed for everything negative that comes out of all media and thinks that they are very responsible and keen on creating games that are suitable for the intended age group. Also Braben, David 2007 thinks that gaming tends to get singled out for these acquisitions and believes that research only takes into account gaming, only one type of media that people use.
Aidman, Amy 2005 believes that boys incorporate violence from early stages of their development from all types of media (TV,Games etc). She believes that boys (Almost half from her study of 70 boys) incorporate violence, threat and conflict from media and incorporate that into their imaginary worlds.
Anderson, Craig & Dill, Karen - Video Games and Aggressive Thoughts 2000 on About.com
Jackson, Paul and Braben, David- Games Study Violence is Launched- Article
Aidman, Amy – Media and the Make Believe World of Children – Book published 2005