Figure 6.

Maximum step height for lead (panel A) and trail foot (panel B), including indications of the within-subject (gray and black) and between-subject standard deviation (red; much greater for holographic than real obstacles). The crossing height and foot clearance at hurdle 1 for lead (panel C) and trail foot (panel D), including indications of within-subject variability (gray and black). Likewise at hurdle 2 (panels E and F). Note that participants 1, 8, and 11, who did not raise their trail foot for holographic obstacles, were excluded from panels B, D, and F.