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

Published in final edited form as: Sci Stud Read. 2011 Jun 8;16(2):141–165. doi: 10.1080/10888438.2010.543446

Table 5.

Parameter Estimates for Modified Logistic Growth Models with Constant Schooling Effect

	Letter-Word Identification	Passage Comprehension	Picture Vocabulary	Sound Awareness
Fixed-Effects
Intercept Mean	383.35^**	423.74^**	352.51^**	441.51^**
Slope Mean	40.99^**	35.37^**	23.14	20.58^**
Curvature (λ)	0.82^**	0.46^**	3.16^**	1.15^**
Age of Inflection (α)	6.08^**	6.20^**	−2.66	4.31^**
Schooling Effect (β)	9.71^**	5.71^**	1.10^*	3.58^**
Random Effects
Intercept Deviation	25.67^**	14.04^**	48.80	13.55^**
Slope Deviation	8.63^**	7.27^**	8.21	3.94^**
Intercept/Slope Correlation	.41^**	.58^**	−.99^**	−.54^**
Residual Deviation	12.88^**	14.43^**	6.82^**	8.68^**

Note. indicates a significant parameter at p<.05;

^**

indicates a significant parameter at p<.01