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The Discriminating Power of Items That Measure More Than One Dimension

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 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Psychological Measurement SAGE

The Discriminating Power of Items That Measure More Than One Dimension

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References (6)

Publisher
SAGE
Copyright
Copyright © by SAGE Publications
ISSN
0146-6216
eISSN
1552-3497
DOI
10.1177/014662169101500407
Publisher site
See Article on Publisher Site

Abstract

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.

Journal

Applied Psychological MeasurementSAGE

Published: Dec 1, 1991

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