A Unified Nonparametric IRT Model for "d"-Dimensional Psychological Test Data ("d"-Isop)

Autor/in	Scheiblechner, Hartmann
Titel	A Unified Nonparametric IRT Model for "d"-Dimensional Psychological Test Data ("d"-Isop)
Quelle	In: Psychometrika, 72 (2007) 1, S.43-67 (25 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0033-3123
DOI	10.1007/s11336-005-1282-1
Schlagwörter	Psychometrics; Intervals; Rating Scales; Psychological Testing; Nonparametric Statistics; Item Response Theory; Models; Test Items; Statistical Studies + Suchen Sie Ihr Suchwort? Psychometry; Psychometrie; Rating-Skala; Psychological test; psychological tests; Psychological examination; Psychologischer Test; Item-Response-Theorie; Analogiemodell; Test content; Testaufgabe
Abstract	The (univariate) isotonic psychometric (ISOP) model (Scheiblechner, 1995) is a nonparametric IRT model for dichotomous and polytomous (rating scale) psychological test data. A weak subject independence axiom W1 postulates that the subjects are ordered in the same way except for ties (i.e., similarly or isotonically) by all items of a psychological test. A weak item independence axiom W2 postulates that the order of the items is similar for all subjects. Local independence (LI or W3) is assumed in all models. With these axioms, sample-free unidimensional ordinal measurements of items and subjects become feasible. A cancellation axiom (Co) gives, as a result, the additive isotonic psychometric (ADISOP) model and interval scales for subjects and items, and an independence axiom (W4) gives the completely additive isotonic psychometric (CADISOP) model with an interval scale for the response variable (Scheiblechner, 1999). The "d"-ISOP, "d"-ADISOP, and "d"-CADISOP models are generalizations to "d"-dimensional dependent variables (e.g., speed and accuracy of response). (Author).
Anmerkungen	Springer. 233 Spring Street, New York, NY 10013. Tel: 800-777-4643; Tel: 212-460-1500; Fax: 212-348-4505; e-mail: service-ny@springer.com; Web site: http://www.springerlink.com
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10