for this experiment session. All subjects were
right handed, and had normal or corrected to
normal vision. Subjects had experience using a
computer Informed consent was provided.
top of controller cube. The cursor cube was
drawn to be superimposed on the bottom center
of the controller cube. The target was a
wireliame graphic cube that appeared on the
table surface to the subject. The stereoscopic,
head-coupled, graphic display was updated at 60
Hz with 1 frame lag of OPTOTRAK
coordinates. Data from the OPTOTRAK were
sampled and recorded at 60 Hz by a Silicon
Graphics Indigo Extreme computer workstation.
A thin physical L-tiame was used to locate the
starting position of the plastic