Fig. S2.

(Left) Depiction of three additional target visibility manipulations used in experiment 1 that were not reported in the original manuscript. Horizontal bars indicate the phase of the gait cycle when the target of the corresponding color was visible. Vertical bands indicate hypothesized critical control phase for each target. (Right) Mean absolute stepping error and 95% CI for each condition. Note that stepping error is less than it is in the Just in Time and Needlessly Early conditions (see Fig. 2). This is consistent with the two targets hypothesis, as there is an overlap in the visibility of the two upcoming targets in all three conditions shown in this figure.