http://news.bbc.co.uk/1/hi/health/4594376.stm - this article on the BBC website is that of recent research into the effects of violent video games on children's behaviour, the article concludes that the games do indeed violent games have a negative effect and the brain activity of young children.
http://news.bbc.co.uk/1/hi/england/leicestershire/3936597.stm- this article from the BBC website is about the video game 'Manhunt' which caused this big debate when two young teenagers acted out the game on innocent people. also it describes the game been taken off the shelves in retail shops.
http://www.psychologymatters.org/videogames.html- this is an article on the work 'craig anderson, Violent video games effects' it explains their research and the findings that the games may even have a stronger effect on children's behaviour than previously thought because of three reasons.
(1) the games are highly engaging and interactive,
(2) the games reward violent behavior, and because
(3) children repeat these behaviors over and over as they play
(this is the most valid and reliable source i have found because the experiments were done in controlled environment using scientific methods.)
http://www.amazon.co.uk/gp/reader/0195309839/ref=sib_dp_pt#reader-page - this is the book by 'Craig Anderson' a famous psychologist in this certain area of children and the media.
