Methods for Identifying Biased Test Items

By Gregory Camilli, Lorrie Ann Shepard, Lorrie A Shepard, et al.

Book Overview

This book makes clear to researchers what item-bias methods can (and cannot) do, how they work and how they should be interpreted.

Advice is provided on the most useful methods for particular test situations. The authors explain the logic of each method - from item-response theory to nonparametric, categorical methods - in terms of how differential item functioning (DIF) is defined by the method and how well the method can be expected to work. A summary of findings on the behaviour of indices in empirical studies is included. The book concludes with a set of principles for deciding when DIF should be interpreted as evidence of bias.

• Format: Paperback
• Language: English
• ISBN: 0803944160
• ISBN13: 9780803944169
• Release Date: April 1994
• Publisher: Sage Publications
• Length: 181 Pages
• Weight: 0.65 lbs.
• Dimensions: 0.5" x 6.1" x 8.4"

Customer Reviews

Very helpful, practical information

As a graduate student in Measurement and Research and as a new employee for a testing company, I needed a good foundation in differential item functioning (DIF) in order to be able to do DIF studies. After pulling relevant articles from the library, I realized I needed some background on this topic before it would really make sense to me. This book helped a lot. The background information on how DIF relates to validity as well as what DIF studies can and cannot accomplish set the stage for a clearer understanding of the actual analyses.I was especially pleased to find SAS code for the Mantel-Haenszel procedure. Also included was a very helpful BILOG example for use in DIF studies that utilize IRT methods. I'm still reading, but in one weekend have gone from complete novice with barely a definitional understanding of DIF to comprehending why such studies are valuable, the history of DIF analysis, and a good idea of how to proceed to do DIF analysis.