A Boundary Mixture Approach to Violations of Conditional Independence

Autor/in	Braeken, Johan
Titel	A Boundary Mixture Approach to Violations of Conditional Independence
Quelle	In: Psychometrika, 76 (2011) 1, S.57-76 (20 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0033-3123
DOI	10.1007/s11336-010-9190-4
Schlagwörter	Test Construction; Item Response Theory; Models; Tests; Test Items; Item Analysis + Suchen Sie Ihr Suchwort? Testaufbau; Item-Response-Theorie; Analogiemodell; Examination; Prüfung; Examen; Test content; Testaufgabe; Itemanalyse
Abstract	Conditional independence is a fundamental principle in latent variable modeling and item response theory. Violations of this principle, commonly known as local item dependencies, are put in a test information perspective, and sharp bounds on these violations are defined. A modeling approach is proposed that makes use of a mixture representation of these boundaries to account for the local dependence problem by finding a balance between independence on the one side and absolute dependence on the other side. In contrast to alternative approaches, the nature of the proposed boundary mixture model does not necessitate a change in formulation of the typical item characteristic curves used in item response theory. This has attractive interpretational advantages and may be useful for general test construction purposes. (As Provided).
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Update	2017/4/10