In this paper on virtual worlds, the author defines virtual worlds as having shared space, a graphical user interface, immediacy, interactivity, persistence and socialization/community. This definition excludes e.g. MUDs. The author then goes on to discuss the differences between game worlds and social virtual worlds. One claim is that social virtual worlds maintain deeper ties to "the off-line world".
In this paper on virtual
In this paper on virtual worlds, the author defines virtual worlds as having shared space, a graphical user interface, immediacy, interactivity, persistence and socialization/community. This definition excludes e.g. MUDs. The author then goes on to discuss the differences between game worlds and social virtual worlds. One claim is that social virtual worlds maintain deeper ties to "the off-line world".