TABLE 1. Percentage of Trials With False Starts at Each Perturbation Time, Collapsed Across All Participants and Three Foreperiods.

Direction	Perturbation time (ms)
	No perturbation	−50	−100	−150	−200	−250
Flexion (%)	2	8	22a	41a,b	42a,b	49a,b
Extension (%)	2	13a	16a	12a	1	1

Note. The no-perturbation condition is shown as a baseline for other measurements and is listed under both the flexion and extension columns.

^aA significant difference from the no-perturbation condition (p < .05).

^bA significant difference between the flexion and extension perturbations (p < .05).