Gesturing through cursors: implementing multiple pointers in group support systems

The authors discuss the issues underlying the concept of gesturing. Specifically, they explore gesturing as applied to users of group support systems. The definition of gesturing is extended beyond simple telepointers to include: the use of motion as a means of expression; and movement that expresses or emphasizes an idea, a sentiment or attitude. The authors address such issues as at what level of interactions should gesturing be supported, how large and what shape should gesture pointers be, how should they move, what are network and processor throughput requirements, and what effect group size may have. The author´s results show that full motion computer gesturing can be supported on PC-LAN (local area network) systems for small groups. Gesturing for medium and large groups requires the use of special techniques such as regulating transmission rates, motion smoothing, and point and quiver cursors