Table 1.

Participant characteristics. Means, standard deviations and group comparisons of demographic data.

	Schizophrenia patients (n = 33)		Healthy controls (n = 31)
	mean	SD	mean	SD	t	p
Age	43	12	41	13	0.69	0.49
Sex	7F/26M		7F/24M		Χ2 = 0.02	0.89
Parental Education	14	3	14	3	0.39	0.69
Laterality Score (Handedness)a	61	45	67	55	− 0.49	0.63
Estimated Verbal IQb	98	16	101	28	0.52	0.61
PANSS Total	59	13			Mild
PANSS Positive	15	4
PANSS Negative	14	5
PANSS General	31	7
SANS	24	16			Minimal
Age at Onset	24	7
Duration of illness (years)	19	13
CPZ Equivalentsc	482	386

Abbreviations: PANSS = Positive and Negative Syndrome Scale; SANS = Scale for the Assessment of Negative Symptoms; CPZ = Chlorpromazine.

^aBased on the modified Edinburgh Handedness Inventory(Oldfield, 1971, White and Ashton, 1976). Laterality scores of − 100 and + 100 denote exclusive use of left or right hand, respectively.

^bBased on standard scores on the reading subtest of the Wide Range Achievement Test (WRAT-III; Wilkinson, 1993).

^cAntipsychotic drug dosage measured in chlorpromazine equivalents (Woods, 2003).