The Differences of Addiction Causes between Massive Multiplayer Online Game and Multi User Domain

This paper proposes research propositions to study on MMOG and MUD addictions based on their causes – flow state and social interaction. Though previous studies relate MMOG addictions to Internet addictions based on social interactions, this study after examining the underlying theories of Use and Gratification Theory and Flow Theory concludes that what cause MMOG addiction is flow experience not social interaction. On the other hand, the cause of MUD addiction is social interaction. After proposing the propositions of MUD and MMOG addiction causes, this study provides possible impacts of such addictions based on the reasoning between the two theories and two online game addictions.