Figure 4
From: Precision and accuracy of the subjective haptic vertical in the roll plane
Average (± 1 StdDev) deviations of SHV (blue and red circles) and SVV (gray triangles, from [8]) in all subjects relative as a function of head roll. Note that trials with CW and CCW rotations of the SVV condition are pooled as no main effect for the direction of arrow rotation was previously noted [8]. Trials with CW rod rotations (blue circles) were shifted CCW relative to trials with CCW rod rotations (red squares) in most head-roll positions. Both for trials with CW rod rotations (upper panel) and for trials with CCW rod rotations (lower panel) the modulation of adjustments within the roll plane is clearly different from average SVV adjustments, showing deviations of smaller size and little roll-angle dependency.