Comparison of PCA, EFA, CFA
Comparison of PCA, EFA, CFA [PDF]
This essay defines and describes Principle Components Analysis (PCA), Exploratory Factor Analysis (EFA), and Confirmatory Factor Analysis (CFA). In addition to a description of each method, the three methods are compared and contrasted. A short list of appropriate applications of each method is provided.
Measurement in Education
Measurement in Education [PDF]
This essay provides a brief summary of the role of measurement in education with an emphasis on issues surrounding instrument selection. The history of educational measurement through classical test theory is described, and the current trend of educational research as it moves away from classical test theory is discussed.