Figure 2.

Trial layout and outcome timing. (a) Participants completed 10 blocks of 22 trials. Five blocks had a 3 : 2 ratio of step turns while the remaining five blocks had a 3 : 2 ratio of spin turns. Two of the trials within each block were catch trials to prevent participants from expecting the central dot being inhibited. Twelve of the trials within each block were uninhibited trials and eight were inhibited. Trial order was evenly split between the four turn angles and trials were randomized within blocks. (b) A walker performing the task and the time-frames of the different outcome measures. WBAM was collected in the steps before and after the inhibited step (step N). iWBAM and ΔiWBAM were calculated for only between steps N and N + 1. Step error was measured at step N + 1.