Table 1.

Basic demographic, cognitive, and clinical measures^a

	Controls (n = 13)	Schizophrenics (n = 12)	P
Age	31.6 ± 9.8	35.3 ± 8.6	>0.33
Handednessb	0.75 ± 0.24	0.66 ± 0.27	>0.40
SESc	2.1 ± 0.8	3.4 ± 1.4	=0.006
Parental SES	2.0 ± 1.2	2.8 ± 1.7	>0.17
Mini-mentald	28.7 ± 1.1	27.1 ± 2.2	=0.026
WAIS-R informatione	11.5 ± 1.9	10.4 ± 1.4	>0.13
Schooling (years)	15.2 ± 1.2	13.2 ± 1.8	=0.003
Illness duration (years)		9.1 ± 8.1
GASf		33.9 ± 10.0
BPRSg		44.3 ± 12.4
Medicationh		490.3 ± 763.8

^aNote: values are mean ± SD.

^bOldfield (1971)−1 = left-handed; and 1 = right-handed.

^cSocio-economic status, Hollingshead (1965). 5 lowest; 1 highest.

^dSummed scores mini-mental state examination.Folstein et al. (1975). Range 0–30.

^eSummed scaled scores, Wechsler (1981).

^fGlobal assessment scale, Endicott et al. (1976).

^gBrief psychiatric rating scale, Overall and Gorman (1962).

^hChlorpromazine equivalents.