Media Violence

Examine trustworthy scientific sources and/or peer-reviewed journal articles to find evidence to support ONE of the following claims:

Violent video games have a direct and negative effect on the aggressive behaviors of adolescents.
There is not enough evidence to support the claim that violent video games have a direct and negative effect on the aggressive behaviors of adolescents.

In your main post, present your claim and the evidence you found to support it. How did the research you found define aggression?
Remember that this is a friendly debate with scientific evidence! As always, your claim must be backed with scientific evidence and not opinion, experience, or your own thoughts. In addition, you must respect the claims of others in your posts and replies.