Combining Classical Test Theory And Item Response Theory
Door: Bechger, T.M., Béguin, A.A., Maris, G.K.J., Verstralen, H.H.F.M. | 03-03-2003 The present paper is about relations between Classical test theory (CTT) and item response theory (IRT). It is demonstrated that IRT can be used to provide CTT statistics in situations where CTT fails.Notwithstanding the many developments in item response theory (IRT), classical test theory ( CTT) continues to be an important framework for test construction. It is therefore useful to have a clear idea about the relations between IRT and CTT. This should improve our appreciation of both theories and facilitate communication to researchers and item writers who are frequently more familiar with CTT than with IRT. In this paper we survey some of the relations between CTT and IRT, and discuss novel applications of CTT that are feasible using IRT.
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