“…In these worlds, users are able to perform a wide range of interactions with the content of the world and other users [4], such as object creation [5,6] and manipulation [6,7], terrain editing [5], and navigating around the world [2,5,6,8,9], as well as chatting synchronously or asynchronously, either verbally via voice or written chat or nonverbally using avatar gestures and other forms of in-world visual interactions [6][7][8][9][10]. These kinds of interactions are performed through the use of avatars [2,5,7,8], that is, users' artificial figures [4,11].…”