Table 1.

Demographic and neuropsychological characteristics of older normal control subjects (ONC) and early Alzheimer’s disease patients (EAD) enrolled in the dot motion dynamics neurophysiological studies. The ages of subjects in these groups were not significantly different. Their neuropsychological characteristics are consistent with group assignment.

	Older Adults, n=16		Alzheimer’s Disease, n=15
	Mean	SD	Mean	SD
Age, y	76.2	10	78.6	8
Education, y	16.6	4	14.7	3
OS Visual acuity (20/x)	31.8	20.1	33.5	20.6
OD Visual acuity (20/x)	27.0	7.7	28.9	7.8
Contrast sensitivity (20/x)*	29.7	14.7	34.7	19.3
MMSE(Max. 30)**	28.9	1.1	25.2	2.5
Money Road Map (max. 32)*	29.4	3.0	25.8	3.6
Figural Memory (max. 10)**	7.1	1.4	5.2	1.5
Verbal Fluency (Normal > 12)**	17.6	3.3	10.8	4.9
Delayed Recall (max. 8)**	6.8	1.2	3.6	1.8
Categorical Naming**	20.6	6.0	12.6	3.3
Line Orientation (max. 30)	23.8	3.9	21.6	7.1
Facial Recognition (max. 54)	46.7	3.5	45.2	6.1

^*p < 0.05,

^**p < 0.005