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. 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 2.

Phenotypic Quadratic Growth Model Estimates for the Four Examined Reading Outcomes

Intercept Linear slope Quadratic slope
Word Identification
 M 384 53 −5.6
 SE 1.65 0.83 0.12
Word Attack
 M 457 23 −2.6
 SE 0.79 0.46 0.07
Rapid Naming
 M −76 19 −2.05
 SE 1.22 0.61 0.08
Reading Comprehension
 M 439 28 −2.8
 SE 11.34 0.73 0.11