Testing for Differential Item Functioning under the "D"-Scoring Method

Autor/inn/en	Dimitrov, Dimiter M.; Atanasov, Dimitar V.
Titel	Testing for Differential Item Functioning under the "D"-Scoring Method
Quelle	In: Educational and Psychological Measurement, 82 (2022) 1, S.107-121 (15 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Dimitrov, Dimiter M.) ORCID (Atanasov, Dimitar V.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0013-1644
DOI	10.1177/00131644211001524
Schlagwörter	Test Bias; Methods; Test Items; Scoring; Probability; Computation + Suchen Sie Ihr Suchwort? Testkritik; Method; Methode; Test content; Testaufgabe; Bewertung; Wahrscheinlichkeitsrechnung; Wahrscheinlichkeitstheorie
Abstract	This study offers an approach to testing for differential item functioning (DIF) in a recently developed measurement framework, referred to as "D"-scoring method (DSM). Under the proposed approach, called "P-Z" method of testing for DIF, the item response functions of two groups (reference and focal) are compared by transforming their probabilities of correct item response, estimated under the DSM, into Z-scale normal deviates. Using the liner relationship between such Z-deviates, the testing for DIF is reduced to testing two basic statistical hypotheses about equal variances and equal means of the Z-deviates for the reference and focal groups. The results from a simulation study support the efficiency (low Type error and high power) of the proposed "P-Z" method. Furthermore, it is shown that the "P-Z" method is directly applicable in testing for differential test functioning. Recommendations for practical use and future research, including possible applications of the "P-Z" method in IRT context, are also provided. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01