Table 1.

Demographics and performance values.

	Young		Old
	Mean	Std	Mean	Std
Age	25.95	2.92	65.20	2.79
Education	15.64	1.94	15.30	3.08
DRS	140.74	2.39	140.00	3.13
Single, median RT	0.690	0.079	0.820	0.140
Dual, median RT	0.970	0.120	1.110	0.230
Single, proportion correct	0.940	0.097	0.900	0.120
Dual, proportion correct	0.920	0.110	0.830	0.130
Dual—single, median RT	0.220	0.093	0.290	0.160
Dual—single, proportion correct	−0.025	0.043	−0.070	0.066