The effect on playing violent video games...

Researchers have found that when a violent video game is played by an adult or child that it does in fact have some effect on the behavior of the player in some way. they have done studies that when you have two similar players and one has played a more violent game that the subject was far more eager than the other player who has not played a game with as violent of gameplay. The studies show that violent games come with an increased level of aggression.


http://serendip.brynmawr.edu/exchange/node/1742