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ERIC Number: ED463307
Record Type: Non-Journal
Publication Date: 2002-Feb
Pages: 23
Abstractor: N/A
Reference Count: N/A
A Primer on Ways To Explore Item Bias.
Cromwell, Susan
This paper provides an introductory primer on methods for exploring item bias. The purposes of item bias analysis are to investigate whether test scores are affected by different sources of variance in the various subpopulations, and if different sources of variance are found, to determine if an unfair advantage exists. The review discusses three primary methods for detecting item bias: (1) methods based on item response theory (IRT); (2) chi-square methods; and (3) methods based on delta plots. When choosing the best item bias detection methodology, the researcher must consider the application of the results, the availability of software needed, and the practicality of implementing the methodology chosen. The IRT model leads the other item bias methods by being the most theoretically sound, although statistically complex, procedure. Chi-square and delta plot methods are not as theoretically sophisticated yet are more practical and easier to implement. (Contains 3 tables, 3 figures, and 15 references.) (SLD)
Publication Type: Information Analyses; Reports - Descriptive; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A