TABLE 7.

Fixed and random effects for treatment model

Fixed effects	Coefficient	SE	df	t Ratio
Posttest mean, γ00	0.884	0.035	21	25.22***
Treatment slope, γ01	0.203	0.053	21	3.82***
Pretest slope, γ10	0.160	0.032	489	4.96***
Quiz 1 slope, γ20	0.142	0.048	489	2.99**
Quiz 2 slope, γ30	0.109	0.037	489	2.94**

Random effects	Variance component	df	χ2	p Value
Posttest mean, u0	0.014	21	199.69	<0.001
Level 1, r	0.041

**p < 0.01.

***p < 0.001.