“…Online gamers, especially those who played MMORPGs and virtual worlds, played for more hours per week and scored higher on problema c game behavior. This confirms earlier findings which showed that especially online games may be more problema c (Chappel, Eatough, Davies, & Griffiths, 2006;Grüsser et al, 2007;Porter, Starcevic, Berle, & Fenech, 2010). More research is needed on the mechanisms that may explain this increased risk.…”