. Author manuscript; available in PMC: 2014 Jan 29.

Published in final edited form as: Sci Stud Read. 2013 Jan 8;17(5):350–368. doi: 10.1080/10888438.2012.729119

Table 4.

Genetic and Environmental Correlations between Intercept and Growth Latent Variables.

	Genetic		Shared Environment		Nonshared Environment
TOWRE Sight Kindergarten – 4^th
	Intercept	Slope	Intercept	Slope	Intercept	Slope
Slope	.48^* [.28, .63]		−.88 [−1.00, 1.00]		.95^* [.77, 1.00]
Quad	−.74^* [−.85, −.62]	−.94^* [−.96, −.90]	.57 [−1.00, 1.00]	−.90 [−1.00, 1.00]	−.99^* [−1.00, −.89]	−.98^* [−1.00, −.91]

TOWRE Decode Kindergarten – 4^th
	Intercept	Slope	Intercept	Slope	Intercept	Slope
Slope	.90^* [.79, 1.00]		−.34 [−1.00, 1.00]		.94^* [.79, 1.00]
Quad	−.98^* [−1.00, −.92]	−.97^* [−1.00, −.92]	.20 [−1.00, 1.00]	−.99 [−1.00, 1.00]	−.96^* [−1.00, −.83]	−.79^* [−.92, −.59]

Woodcock Passage Comprehension 1^st – 4^th
	Intercept		Intercept		Intercept
Shape	−.69^* [−1.00, −.27]		−.86^* [−1.00, −.47]		−.50^* [−.68, −.18]

WRAT Spelling 1^st – 4^th
	Intercept		Intercept		Intercept
Shape	.82^* [.18, 1.00]		−.74 [−1.00, .82]		−.35^* [−.55, −.03]

Note: Unspecified model with three time points estimated for Passage Comprehension and Spelling: post-1^st, post-2^nd, and post-4^th grade. Quadratic model with four time points (including post-kindergarten) estimated for TOWRE Sight and Decode.

p <.05 determined using 95% confidence intervals, confidence intervals presented in brackets.