Seung-bae Park Namho Chung Mediating roles of self-presentation desire in online game community commitment and trust behavior of Massive Multiplayer Online Role-Playing Games. 2372-2379 2011 27 Computers in Human Behavior 6 http://dx.doi.org/10.1016/j.chb.2011.07.016 db/journals/chb/chb27.html#ParkC11