The Use of the lz and lz* Person-Fit Statistics and Problems Derived From Model Misspecification

Rob R. Meijer and Jorge N. Tendeiro

Journal of Educational and Behavioral Statistics, 2012, vol. 37, issue 6, 758-766

Abstract: We extend a recent didactic by Magis, Raîche, and Béland on the use of the l z and l z * person-fit statistics. We discuss a number of possibly confusing details and show that it is important to first investigate item response theory model fit before assessing person fit. Furthermore, it is argued that appropriate distributions are only a first step for practical use of person-fit statistics.

Keywords: item response theory; person fit; model fit; aberrant response patterns; validity scales (search for similar items in EconPapers)
Date: 2012
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:sae:jedbes:v:37:y:2012:i:6:p:758-766

DOI: 10.3102/1076998612466144

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