Table 2.

Lead distance of gaze relative to finger position in centimeters computed as follows: I, the best fit of τ_o = $\frac{\Delta s}{v}$ (SD obtained by bootstrap procedure with n = 100); II, the product of finger velocity v and primary lead time τ₀; and III, the distance between gaze and finger position at each saccade onset

Subject	Mean ± SD (cm) [median (cm)]
	Method I	Method II	Method III
S1	2.2 ± 0.3	2.5 ± 1.0 [2.6]a	3.8 ± 2.5 [3.1]b
S2	1.5 ± 0.2	1.7 ± 1.0 [1.6]	2.9 ± 2.3 [2.2]b,c
S3	1.5 ± 0.2	1.8 ± 1.7 [1.5]	3.0 ± 1.9 [2.6]b,c
S4	2.9 ± 0.2	3.3 ± 0.8 [3.3]a	4.2 ± 2.5 [3.9]b
S5	3.5 ± 0.1	3.6 ± 0.6 [3.6]	3.7 ± 2.3 [3.3]
All subjects	2.6 ± 0.1	2.6 ± 1.4 [2.7]	3.6 ± 2.4 [3.1]b,c

^a,b,cSignificant difference (p < 0.05) between the lead distance distribution obtained by methods I and II, methods I and III, and methods II and III, respectively.