Table 1.

Pearson correlation between performance error and T-, N-, and C-costs for all 16 subjects

	Subject	T-cost		N-cost		C-cost
		r	Sig	r	Sig	r	Sig
Virtual	1	0.985	***	−0.380		0.087
	2	0.950	***	−0.561		−0.159
	3	0.975	***	0.141		0.278
	4	0.995	***	−0.357		−0.161
	5	0.995	***	−0.483		−0.294
	6	0.845	***	0.338		0.265
	7	0.980	***	−0.051		−0.001
	8	0.794	**	0.298		0.157
	Mean	0.940		−0.132		0.022
	Std	0.077		0.360		0.212
Real	9	0.827	**	0.685	*	0.594	*
	10	0.732	**	0.052		0.260
	11	0.788	**	−0.002		0.096
	12	0.792	**	0.655	*	0.927	***
	13	0.889	***	0.797	**	0.572
	14	0.635	*	0.579	*	0.107
	15	0.836	**	0.493		0.612	*
	16	0.181		−0.003		0.787	**
	Mean	0.710		0.407		0.494
	Std	0.227		0.336		0.308

The asterisks represent the level of significance:

^*0.01 < P < 0.05,

^**0.001 < P < 0.01,

^***P < 0.001.