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Table 4 Weighted average of variance components and proportions for student performance ratings from a two-facet fully crossed p x d x r design

From: Exploring assessor cognition as a source of score variability in a performance assessment of practice-based competencies

SourcedfSSMSVariance estimateProportion
p9.388.659.550.640.40
d5.08.871.770.030.03
r1.04.064.060.050.03
p x d46.435.090.760.160.13
p x r9.310.301.110.120.08
d x r5.06.901.380.080.05
p x d x r, e46.420.390.440.420.29