TABLE 2.

Correlations Between Intercept Values on the Four “Deficit” Subtests and Slope Values on the Three “Developmental Lag” Subtests of the Wechsler Intelligence Scale for Children–Revised Among Future Schizophrenia Case Subjects and Healthy Comparison Subjects

Intercept on the Wechsler Intelligence Scale for Children–Revised	Slope on the Wechsler Intelligence Scale for Children–Revised	Correlation		Analysis
		Future Schizophrenia Case Subjects (N=35)	Healthy Comparison Subjects (N=556)	Difference Between Two Independent Correlations (z)a	p
Vocabulary	Block design	0.78	0.42	3.33	0.00
	Arithmetic	0.80	0.59	2.28	0.01
	Digit symbol	0.55	0.27	1.83	0.03
Picture completion	Block design	0.80	0.58	2.44	0.01
	Arithmetic	0.57	0.41	1.17	0.12
	Digit symbol	0.52	0.21	2.03	0.02
Similarities	Block design	0.57	0.43	0.97	0.17
	Arithmetic	0.72	0.52	1.80	0.04
	Digit symbol	0.57	0.26	2.09	0.02
Information	Block design	0.53	0.51	0.12	0.45
	Arithmetic	0.67	0.65	0.27	0.39
	Digit symbol	0.28	0.28	−0.01	0.50
Average correlation		0.61	0.43	1.53	0.06

^aAnalyses performed for differences between correlations after Fisher’s r-to-z transformation of correlations (one-tailed test).