Table 1.

Summary of demographic variables

		Healthy Adults (N = 40)
		Mean/n	SD	Range
Sex
Female		21
Male		19
Age (years)		32.0	10.9	18–55
Race/Ethnicity
Native American		1
Asian		8
Black/African American		12
White/Caucasian		14
More than one race		5
EHI LQ a		78.17	23.80	20–100
Education (years)		15.4	1.95	12–19
NART b		35.4	9.29	16–55
Parental SES c		45.15	16.62	7.5–66

^aEdinburgh Handedness Inventory (Oldfield, 1971) laterality quotient, which can vary between −100.0 (completely left-handed) and +100.0 (completely right handed). ^b National Adult Reading Test (Bright, Jaldow, & Kopelman, 2002). ^c Parental socioeconomic status (Hollingshead, 1975), n = 36.