Table 2 Correlations (r) between mean response time and mean individual variance at each task level in the dementia of the Alzheimer's type (DAT), and dementia with Lewy body (DLB) groups.

	DAT	DLB
Task
Simple	0.47*	0.71**
Choice	0.59**	0.62**
Focused	0.66**	0.48**
Divided	0.32	0.57**
Executive 1	0.22	−0.28
Executive 2	0.33	0.04
Spatial 1	0.56*	0.41
Spatial 2	0.55*	−0.32

*p<0.01; **p<0.001.