. Author manuscript; available in PMC: 2013 Feb 1.

Published in final edited form as: J Abnorm Psychol. 2011 Oct 24;121(1):212–224. doi: 10.1037/a0025823

Table 4.

Single Regression Equations for Each Sample, with Reading Skill as the Dependent Variable

	Samples
	CLDRC			ILTS
Variable	PA	L	PS/NS	PA	L	NS
Theoretical Maximum R	.87	.86	.85	.85	.69	.88
R	.74	.63	.59	.69	.33	.52
R²	.55	.40	.35	.47	.11	.27

Note. CLDRC = Colorado Learning Disabilities Research Center; ILTS = International longitudinal Twin Study; PA = phoneme awareness; L = language skill; PS = processing speed; NS = naming speed. Theoretical maximum R is based on the reliabilities of each of the predictors.