Table 2.

Model Fit Comparisons.

Comparison	Chi Square	df	P value
Main Effects Achievement vs. Interaction Achievement	7.970	3	0.047
Main Effects Interest vs. Interaction Interest	2.962	3	0.398
Main Effects Bivariate vs. Interaction Bivariate	15.902	9	0.069
Interaction Bivariate vs. Reduced Bivariate	7.02	8	0.534
Main Effects Bivariate vs. Reduced Bivariate	8.882	1	0.003