. Author manuscript; available in PMC: 2011 Aug 1.

Published in final edited form as: J Educ Psychol. 2010 Aug 1;102(3):635–651. doi: 10.1037/a0019319

Table 7.

Predicting WIAT II Reading Comprehension from WIAT II Written Expression (WE), Listening Comprehension (LC), and Oral Expression (OE) in Multiple Regression

Cohort and Grade	R²	F(df)=	p	Standardized beta	t	p
Younger Cohort
Grade 1	.51	F(3,120)=41.35	,.001
WE				.42	6.00	<.001
LC				.32	4.66	<.001
OE				.21	2.93	.004
Grade 3	.47	F(3,108)=32.07	<.001
WE				.30	3.50	.001
LC				.40	5.05	<.001
OE				.16	2.07	.041
Grade 5	.55	F(3,109)=43.75	<.001
WE				.18	2.58	.011
LC				.59	8.34	<.001
OE				.16	2.30	.024
Older Cohort
Grade 3	.48	F(3,106)=32.59	<.001
WE				.40	5.00	<.001
LC				.36	4.50	<.001
OE				.16	2.21	.029
Grade 5	.44	F(3,101)=25.87	<.001
WE				.13	1.49	.139
LC				.55	6.45	<.001
OE				.10	1.20	.234
Grade 7	.44	F(3,94)=24.27	<.001
WE				.36	4.17	<.001
LC				.42	5.17	<.001
OE				.08	.95	.343