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

Published in final edited form as: Learn Individ Differ. 2011 Dec 9;22(1):37–45. doi: 10.1016/j.lindif.2011.11.015

Table 2.

Parameter Estimates from Univariate Models of Math.

Parameter	Step 1: Full Interaction Model		Step 2: Nonsignificant Interactions Trimmed		Step 3: Nonsignificant Main Effects Trimmed
Parameter	Estimate	95% CI	Estimate	95% CI	Estimate	95% CI
a	.303	[.207, .399]	.301	[.199, .403]	.301	[.199, .403]
a′	.149	[.067, .231]	.124	[.051, .197]	.124	[.051, .197]
c	.521	[.462, .580]	.526	[.467, .585]	.526	[.467, .585]
c′	−.055	[−.128, .018]
e	.311	[.280, .342]	.313	[.280, .346]	.313	[.280, .346]
e′	.000	[−.029, .029]
s	.423	[.360, .486]	.423	[.360, .486]	.423	[.360, .486]
AIC	3746.587		3745.094		3745.094
BIC	3791.690		3781.177		3781.177

Note. Parameters in bold are significant at P <.05.