Table 1.

Demographic characteristics of study participants.

	PD (n = 33)	NC (n = 26)
Demographics
Age (years)	71.2 (1.4)	69.8 (1.3)
Education (years)	16.6 (0.4)	16.4 (0.5)
Gender (M/F)	24/9	17/9
Ethnicity (% Caucasian)	100%	92%
Geriatric Depression Scale	5.2 (0.9)*	2.9 (0.4)
Dementia Rating Scale	137.3 (1.2)*	140.6 (0.5)
WRAT-4 Reading	60.7 (3.2)	65.1 (0.8)
Disease Duration (years)	11.1 (1.1)	-
Hoehn & Yahr (frequency)		-
Stage 1	1
Stage 1.5	1
Stage 2	13
Stage 2.5	2
Stage 3	10
Stage 4	4

Note. Data for demographics represent means and standard errors. Data for Hoehn & Yahr ratings represent frequencies. NC= Normal Controls, PD = Parkinson’s disease patients. WRAT-4 Reading = Reading subtest from the Wide Range Achievement Test – Fourth Edition.

^*p < .05.