“Video game addiction is a global phenomenon and appears to lead to poorer grades in school and serious psychological problems, including depression, anxiety, and social phobia, said an international team of researchers who followed over 3,000 third through eighth grade students in Singapore and found the percentage of pathological youth gamers there to be similar to other countries. […]
“We’re starting to see a number of studies from different cultures — in Europe, the US and Asia — and they’re all showing that somewhere around 7 to 11 per cent of gamers seem to be having real problems to the point that they’re considered pathological gamers.”
To be considered a pathological gamer, the person has to be experiencing damage to several areas of their life, including areas like school, social, family, occupational, and psychological functioning.”
original study: “Pathological Video Game Use Among Youths: A Two-Year Longitudinal Study.” (Gentile, Choo, Liau, Sim, Li, Fung, and Khoo).
Pediatrics, published online 17 January 17, 2011