NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ890288
Record Type: Journal
Publication Date: 2010-Aug
Pages: 18
Abstractor: As Provided
ISSN: ISSN-0013-1644
Investigating an Invariant Item Ordering for Polytomously Scored Items
Ligtvoet, Rudy; van der Ark, L. Andries; te Marvelde, Janneke M.; Sijtsma, Klaas
Educational and Psychological Measurement, v70 n4 p578-595 Aug 2010
This article discusses the concept of an invariant item ordering (IIO) for polytomously scored items and proposes methods for investigating an IIO in real test data. Method manifest IIO is proposed for assessing whether item response functions intersect. Coefficient H[superscript T] is defined for polytomously scored items. Given that an IIO holds, coefficient H[superscript T] expresses the accuracy of the item ordering. Method manifest IIO and coefficient H[superscript T] are used together to analyze a real data set. Topics for future research are discussed. (Contains 4 tables and 2 figures.)
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A