Table 3.

Generalizability ANOVA table (φ = 0.605)

Source	Df	SS	MS	Variance component	% Variance
S	59	1,237.23	20.9701	0.575	27.4
D	2	885.485	442.743	0.734	35.0
I:D	27	88.5815	3.28080	0.048	2.29
S|D	118	428.948	3.63515	0.325	15.5
S|I:D	1,592	659.252	0.41384	0.414	19.8

$G=\frac{{\sigma }^2\left(\mathrm{s}\right)}{{\sigma }^2\left(\mathrm{s}\right)+{(\sigma }^2\left(\mathrm{d}\right)/3)+{(\sigma }^2(\mathrm{i}:\mathrm{d})/90)+{(\sigma }^2\left(\mathrm{s}\right|\mathrm{d})/3)+{(\sigma }^2\left(\mathrm{s}\right|\mathrm{i}:\mathrm{d})/90)}$= 0.605

σ² variance component

S student, D subscale, I item, Df degrees of freedom, SS sums of squares, MS mean square