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date: 16 May 2021

Abstract and Keywords

This chapter provides a unified treatment of seven major topics in test theory. It relates Modern Theory based on item response modeling to classical linear modeling through the use of the common factor model. The topics include choosing a metric; measurement and measurement error (reliability); item selection: homogeneity and dimensionality; validity; equating tests; comparing populations. The treatment of these problems makes no distribution assumptions.

Keywords: Test theory, metric, homogeneity, dimensionality, validity, equating, differential item functioning

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