Table 1.

Subject group demographics, neuropsychological test scores, and visual motion thresholds.

	OA (n = 18)	AD (n = 14)
Demographics
Age (years)	75.39 (7.09)	74.93 (+/− 5.91)
MMSE (max. 30)	28.94 (+/− 1.16)	24.08** (+/− 3.07)
Education (years)	15.67 (+/− 2.81)	14.46 (+/− 2.18)
Neuropsychological Tests
Delayed Recall	7.06 (+/− .94)	2.58** (+/− 1.68)
Verbal Paired Assoc.	18.61 (+/− 3.24)	6.75** (+/− 4.33)
Figural Memory	7.00(+/− 1.03)	4.38** (+/− .96)
Verbal Fluency	22.89 (+/− 3.72)	4.75** (+/− 4.75)
Money Road Map	30.56 (+/− 2.23)	24.92** (+/− 3.62)
Facial Recognition	47.22 (+/− 3.57)	41.23** (+/− 5.76)
Line Orientation	25.61 (+/− 3.29)	21.50** (+/− 4.11)
Visual Motion Thresholds
Horizontal motion	13.65 (+/− 4.95)	24.82* (+/− 9.28)
Out left/right radial motion	15.82 (+/− 8.10)	30.82** (+/− 25.58)
In/Out left/right radial motion	19.71 (+/− 19.74)	68.82** (+/− 40.16)

^*p < .05

^**p < .01