Boston, Massachusetts USA, April 24-28, 1994
There are two aspects to the new technique. First, in contrast to normal practice, the tracking symbol is a volume rather than a point. Second, the surface of this volume is semi-transparent, thereby affording occlusion cues during target acquisition.
The experiment shows that the volume/occlusion cues were effective in both monocular and stereoscopic condistions. For some tasks where stereoscopic presentation is unavailable or infeasible, ther new technique offers an effective alternative.