Shavelson R., Webb N. Generalizability Theory. A Primer 1991

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Concepts in Generalizability Theory
Statistical Model Underlying Generalizability Theory
Generalizability Studies with Crossed Facets
Generalizability Studies with Nested Facets
Generalizability Studies with Fixed Facets
Decision Studies: Measurement Error and Generalizability Coefficients
Generalizability and Decision Studies with the Same Design
Generalizability and Decision Studies with Different Designs
Summary and Next Steps