3.2. Pointing accuracy
For each device and target orientation, the recorded pointing
orientations were averaged across subjects. The deviations of the
averages from the orientations of the corresponding targets are
plotted as radar charts in Fig. 3 (top row). The radii of the radar
charts denote the orientations of the targets in degrees. The vertical
axis of the radar charts in the top row of Fig. 3 show the deviation
values in degrees.