References
1. Ko, C.-H., Liu, G.-C., Hsiao, S., Yen, J.-Y., Yang, M.-J., Lin, W.-C., Yen, C.-F., et al. (2009). Brain activities associated with gaming urge of online gaming addiction. Journal of Psychiatric Research, 43,(7), pp. 739-
2. Ko, C.-H., Liu, G.-C., Yen, J.-Y., Chen, C.-Y., Yen, C.-F., & Chen, C.-S. (2011). Brain correlates of craving for online gaming under cue exposure in subjects with Internet gaming addiction and in remitted subjects. Addiction Biology. Retrieved from http://www.ncbi.nlm.nih.gov/pubmed/22026537 Source
Further Reading
http://www.techaddiction.ca/gaming-addiction-statistics.html (has extracts from research on this page)
http://www.cracked.com/article_18461_5-creepy-ways-video-games-are-trying-to-get-you-addicted.html (introduces you to the concept of the Skinner Box, a psychological mechanism used by certain gaming companies - think of it like nicotine for cigarettes)
http://www.cracked.com/article_18709_6-devious-ways-farmville-gets-people-hooked.html (farmville addiction lol)