The Discriminating Power of Items That Measure More Than One Dimension

Determining a correct response to many test items frequently requires more than one ability. This paper describes the characteristics of items of this type by proposing generalizations of the item response theory concepts of discrimination and information. The conceptual framework for these statisti...

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Veröffentlicht in:	Applied psychological measurement 1991-12, Vol.15 (4), p.361-373
Hauptverfasser:	Reckase, Mark D., McKinley, Robert L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Ability Biological and medical sciences Definitions Difficulty Level Equations (Mathematics) Fundamental and applied biological sciences. Psychology Generalization Item Discrimination (Tests) Item Response Theory Mathematical Models Multidimensional Discrimination Psychology. Psychoanalysis. Psychiatry Psychology. Psychophysiology Psychometrics. Statistics. Methodology Statistics. Mathematics Test Items
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Beschreibung
Zusammenfassung:	Determining a correct response to many test items frequently requires more than one ability. This paper describes the characteristics of items of this type by proposing generalizations of the item response theory concepts of discrimination and information. The conceptual framework for these statistics is presented, and the formulas for the statistics are derived for the multidimensional extension of the two-parameter logistic model. Use of the statistics is demonstrated for a form of the ACT Mathematics Usage Test.
ISSN:	0146-6216 1552-3497
DOI:	10.1177/014662169101500407