, Volume 16, Issue 1 Supplement, pp 109-119

Methodological issues for building item banks and computerized adaptive scales

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Abstract

This paper reviews important methodological considerations for developing item banks and computerized adaptive scales (commonly called computerized adaptive tests in the educational measurement literature, yielding the acronym CAT), including issues of the reference population, dimensionality, dichotomous versus polytomous response scales, differential item functioning (DIF) and conditional scoring, mode effects, the impact of local dependence, and innovative approaches to assessment using CATs in health outcomes research.

Thanks to David J. Weiss for extremely useful comments on an earlier draft. Any errors that remain are, of course, our own.