. Author manuscript; available in PMC: 2016 Feb 3.

Published in final edited form as: Clin Neuropsychol. 2015 Dec 21;29(7):985–1001. doi: 10.1080/13854046.2015.1118553

Table 2.

Mean Z-scores Across Cognitive Domains/Measures

	Essential Tremor (N=68)	Parkinson’s (N=68)
	Mean Z-score (SD)	Mean Z-score (SD)
HVLT Word List
Immediate Total Recall	−0.43 (1.05)	−0.71 (1.21)
20’ Delayed Recall	−0.74 (1.30)	−1.01 (1.50)
WMS-III Logical Memory (Stories)
Immediate Total Recall	−0.03 (1.06)	−0.05 (1.18)
30’ Delayed Recall	0.23 (1.03)	0.25 (1.15)
Auditory Attention/ Working Memory
Digit Span Total Score (WMS-III)	0.08 (0.91)	0.24 (1.00)
Language
BNT	0.04 (1.05)^*	0.44 (1.15)^*
Vocabulary (WASI)	0.38 (0.80)	0.61 (0.91)
Composite Score	0.21 (0.74)	0.53 (0.92)
Executive Function
COWA (letter fluency)	−0.74 (1.00)^*	−0.37 (1.16)^*
Stroop Color-Word, 3^rd trial	−0.41 (0.99)	−0.17 (1.07)
Composite Score	−0.57 (0.77)^*	−0.26 (0.92)^*

For a normative sample, the Z-score mean is 0 and standard deviation (SD) is 1;

Significant difference (p < .05)

HVLT = Hopkins Verbal Learning Test; WMS-III = Wechsler Memory Scale, 3rd edition; BNT = Boston Naming Test; WASI = Wechsler Abbreviated Scale of Intelligence; COWA = Controlled Oral Word Association Test; Stroop Color Word Test (Golden version)

Note: normative scores for both the HVLT and WMS-III are based on age, but not sex or education; Normative scores for remaining tasks based on age, education and sex.