Table 3.

R² values and mean absolute residual errors across all trials of all subjects for each model

	Ten subjects			Eight subjects
	R2	Residual errors	t-Test	R2	Residual errors	t-Test
(a) Based on all conditions
Model 1	0.66	11.40	–	0.70	8.94	–
Model 2: Model 1 plus Tv	0.67	11.07	bb	0.74	8.45	bbb
Model 3: Model 1 plus Hv	0.66	11.29	(b)	0.71	8.77	b
Model 4: Model 1 plus Td	0.66	11.35	ns	0.71	8.92	ns
Model 5: Model 1 plus Tv and Hv	0.68	10.75	bbb	0.76	8.02	bbb
Model 6: Model 1 plus Tv, Hv, and Td	0.69	10.61	bbb	0.76	7.95	bbb
(b) Based on TV-HV condition only
Model 1	0.74	11.74	–	0.85	6.13	–
Model 4: Model 1 plus Td	0.75	11.18	c	0.88	5.75	(c)
(c) Based on each condition separatelya
Model 1	–	9.85	ddd	–	7.31	ddd

Tv target visibility condition, Hv hand visibility condition, Td target direction condition

^aResidual errors are calculated for each condition separately and then all residual errors are pooled together across all conditions

^bbbP < 0.001,

^bbP < 0.01,

^bP < 0.05,

^(b)0.05 < P < 0.1; ns not significant for a comparison of residual errors from Model 1 in the section (a)

^cP < 0.05,

^(c)0.05 < P < 0.1 for a comparison of residual errors from Model 1 in the section (b)

^dddP < 0.001 for a comparison of residual errors from Model 6 in the section (a)