. Author manuscript; available in PMC: 2014 Feb 1.

Published in final edited form as: Child Dev. 2013 Apr 10;84(6):10.1111/cdev.12104. doi: 10.1111/cdev.12104

Table 3.

Estimates and Confidence Intervals (in Parentheses) for Genetic and Environmental Components of Variance in Latent Quadratic Growth Model Parameters

	Intercept			Linear slope			Quadratic slope
	Genetic	Shared env	Nonshared	Genetic	Shared env	Nonshared	Genetic	Shared env	Nonshared
WID	0.35 (0.22, 0.51)^*	0.62 (0.46, 0.74)^*	0.03 (0.01, 0.06)^*	0.18 (0.06, 0.37)^*	0.82 (0.63, 0.94)^*	0.0005 (0.00, 0.02)	0.18 (0.04, 0.42)^*	0.82 (0.57, 0.96)^*	0.00 (0.00, 0.02)
WATT	0.37 (0.16, 0.61)^*	0.57 (0.34, 0.76)^*	0.05 (0.01, 0.11)^*	0.51 (0.17, 0.93)^*	0.48 (0.07, 0.81)^*	0.02 (0.00, 0.08)	0.45 (0.08, 0.97)^*	0.52 (0.01, 0.89)^*	0.03 (0.00, 0.18)
RN	0.55 (0.17, 0.79)^*	0.2 (0.001, 0.43)^*	0.24 (0.17, 0.34)^*	0.41 (0.08, 0.73)^*	0.33 (0.05, 0.59)^*	0.25 (0.15, 0.38)^*	0.38 (0.02, 0.71)^*	0.36 (0.07, 0.63)^*	0.25 (0.14, 0.40)^*
Comp	0.38 (0.18, 0.61)^*	0.55 (0.32, 0.74)^*	0.06 (0.02, 0.11)^*	0.24 (0.00, 0.58)	0.68 (0.36, 0.91)^*	0.07 (0.01, 0.18)^*	0.31 (0.00, 0.73)	0.58 (0.22, 0.94)^*	0.06 (0.001, 0.23)^*

Note. WID = Woodcock Reading Mastery Test (WRMT) Word Identification; WATT = WRMT Word Attack; Comp = WRMT Reading Comprehension; RN = Comprehensive Test of Phonological Processing, Rapid Naming.

p < .05.