“…MMOs are two-or three-dimensional persistent online spaces where participants could complete quests, coordinate joint actions, and advance their character, called ''avatars'' (Castronova, 2005;Ducheneaut, Yee, Nickell, & Moore, 2006;Williams, Yee, & Caplan, 2008). More important, all these activities can be, and sometimes must be, accomplished through social interactions with other players.…”