Item-Score Reliability in Empirical-Data Sets and Its Relationship with Other Item Indices

Autor/inn/en	Zijlmans, Eva A. O.; Tijmstra, Jesper; van der Ark, L. Andries; Sijtsma, Klaas
Titel	Item-Score Reliability in Empirical-Data Sets and Its Relationship with Other Item Indices
Quelle	In: Educational and Psychological Measurement, 78 (2018) 6, S.998-1020 (23 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0013-1644
DOI	10.1177/0013164417728358
Schlagwörter	Test Items; Test Reliability; Correlation; Comparative Analysis; Scores; Methods; Item Analysis + Suchen Sie Ihr Suchwort? Test content; Testaufgabe; Testreliabilität; Korrelation; Method; Methode; Itemanalyse
Abstract	Reliability is usually estimated for a total score, but it can also be estimated for item scores. Item-score reliability can be useful to assess the repeatability of an individual item score in a group. Three methods to estimate item-score reliability are discussed, known as method MS, method [lambda][subscript 6], and method CA. The item-score reliability methods are compared with four well-known and widely accepted item indices, which are the item-rest correlation, the item-factor loading, the item scalability, and the item discrimination. Realistic values for item-score reliability in empirical-data sets are monitored to obtain an impression of the values to be expected in other empirical-data sets. The relation between the three item-score reliability methods and the four well-known item indices are investigated. Tentatively, a minimum value for the item-score reliability methods to be used in item analysis is recommended. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01