Table 4.

Results of Block Entry Regression: Regression Coefficients and Variance Explained by Each Block of Variables

Coefficient	B	β	t Value	p Value
Model 1
Age	–0.01	–0.01	–0.11	0.91
Reading	0.02	0.13	1.73	0.09
Vocabulary	0.17	0.15	2.04	0.04
Matrix reasoning	0.27	0.21	2.95	0.00
Digit span forward	0.23	0.05	0.73	0.47
Digit span backward	1.02	0.21	3.02	0.00
Model 2
Age	–0.05	–0.03	–0.45	0.65
Reading	0.01	0.06	0.83	0.41
Vocabulary	0.01	0.01	0.17	0.86
Matrix reasoning	0.05	0.04	0.54	0.59
Digit span forward	0.03	0.01	0.10	0.92
Digit span backward	0.70	0.14	2.22	0.03
Counting	0.01	0.00	0.03	0.98
Number knowledge	0.86	0.17	2.47	0.01
Nonverbal calculation	0.57	0.14	1.74	0.08
Story problems	0.19	0.06	0.65	0.51
Number combinations	0.76	0.28	3.00	0.00

Model	R 2	R2 Change	F Change	df 1	df 2
1	0.26		11.07**	6	191
2	0.42	0.16	10.26**	5	186

^**p < .01.