DIF items effects on Kuder-Richardson 20 formula and construct validity: an exploration using the Mantel-Haenszel method
by Mahmoud Alquraan
International Journal of Quantitative Research in Education (IJQRE), Vol. 3, No. 4, 2016

Abstract: This study aims to explore the effect of DIF items detected by Mantel-Haenszel (MH) method on the reliability (KR₂₀) and construct validity (internal structure) of test scores. The current study used a verbal ability test developed by Enab (1994) for Jordanian students of the age group (9-12) years. The test consists of 40 multiple-choice items distributed to seven subtests, and it was distributed to (758) students. Results show that removing DIF test items does not have a statistical effect on the reliability coefficient (KR₂₀). The confirmatory factor analysis provides evidence that removing DIF items detected by MH leads to better construct validity (internal structure) of the test scores.

Online publication date: Wed, 22-Feb-2017

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Quantitative Research in Education (IJQRE):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com