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Person fit assessment using the PerFit package in R

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Doi: 10.20982/tqmp.12.3.p232

Mousavi, Amin , Tendeiro, Jorge N. , Younesi, Jalil
232-242
Keywords: Person fit , Item response theory , Aberrant responding , Test validity
(no sample data)   (no appendix)

The validity of scores derived from an educational or psychological testing situation determines the accuracy and appropriateness of inferences made about an examinee based on his/her test score. Person fit assessment provides a framework for assessing the conformity of a test score to a given measurement model or to a group of examinees as an indicator of validity/invalidity of the test score. This paper presents a brief overview of person fit assessment, the effect of person misfit on ability estimation, the PerFit R package as a powerful tool for person fit assessment, and two practical examples on how to use PerFit for person fit assessment.


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