Scott, S.Carpendale, S.Inkpen, K.2008-02-272008-02-272004-03-29http://hdl.handle.net/1880/45766Researchers seeking alternatives to traditional desktop computers have begun exploring the potential collaborative benefits of digital tabletop displays. However, there are still many open issues related to the design of collaborative tabletop interfaces, such as whether these systems should automatically orient tabletop items or enforce ownership of tabletop content. Understanding the natural interaction practices that people use during tabletop collaboration with traditional media (e.g., pen and paper) can help to address these issues. Interfaces that are modeled on these practices will have the additional advantage of supporting the interaction skills people have developed over years of collaborating at traditional tables. To gain a deeper understanding of these interaction practices we conducted two observational studies of traditional tabletop collaboration in both casual and formal settings. Our results reveal that collaborators use three types of tabletop territories to help coordinate their interactions within the shared tabletop workspace: personal, group, and storage territories. Findings from a spatial analysis of collaborators tabletop interactions reveal important properties of these tabletop territories and the role that they play in the collaboration process.EngComputer Scienceunknown2004-743-0810.11575/PRISM/30517