Few More Sources
http://www.jstor.org/view/10548289/ap050025/05a00080/0
http://www.springerlink.com/content/gnv838g7r2316776/
http://archpedi.ama-assn.org/cgi/content/abstract/155/1/17
http://abs.sagepub.com/cgi/content/abstract/45/3/456
http://books.google.com/books?hl=en&lr=&id=I1P8zLtmC8YC&oi=fnd&pg=RA1-PR15&sig=Vyn0T_bLZoWgMDWRMX_tglwH5CM&dq=social+impact+of+video+games#PRA1-PR15,M1
http://portal.acm.org/citation.cfm?id=958735
http://portal.acm.org/citation.cfm?id=1031607.1031667