No link between violent video games and aggression

This article reports on the results of the first long-term study of playing online games and violence.

After an average playtime of 56 hours over the course of a month with “Asheron’s Call 2,” a popular MMRPG, or “massively multi-layer online role-playing game,” researchers found “no strong effects associated with aggression caused by this violent game,” said Dmitri Williams, the lead author of the study.
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Nor was game play a predictor of aggressive behaviors. Compared with the control group, the players neither increased their argumentative behaviors after game play nor were significantly more likely to argue with their friends and partners.
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“I’m not saying some games don’t lead to aggression, but I am saying the data are not there yet,” Williams said. “Until we have more long-term studies, I don’t think we should make strong predictions about long-term effects, especially given this finding.”