Figure 2. Mean response time by stimulus orientation and posture.
Mean response time plotted as a function of stimulus hand orientation for all 6 hand postures. The palm posture, shown in red, is different from the others, being markedly asymmetrical about 180° with higher response times to ‘lateral’ rotations (315°, 270°, 225°) than to ‘medial’ rotations of the same magnitude (45°, 90°, 135°).