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. Author manuscript; available in PMC: 2010 Aug 1.
Published in final edited form as: J Marriage Fam. 2009 Aug 1;71(3):575–591. doi: 10.1111/j.1741-3737.2009.00620.x

Table 3.

Summary of HLM Models Without Covariates

BPI Reading Math
Variable β SE β β SE β β SE β
Intercept 9.13*** 0.10 16.80*** 0.14 14.96*** 0.16
Age 0.23*** 0.05 8.86*** 0.07 8.73*** 0.08
Age squared −0.05*** 0.01 −0.43*** 0.01 −0.46*** 0.01
Observations 3,270 3,293 3,383

Note: Coefficients and standard errors from HLM models are presented. Age is centered at 5/6 so that it increases from 0 (at age 5/6) to 6 (at age 11/12).

***

p<0.001.