Propensity score matching was used to control for the distributional differences in ability between two simulated data sets. One data set represented English speaking examinees and the second data set represented Spanish speaking examinees who received the Spanish language version of the same test. The ability distributions of the two populations were set to mirror the data from a large-scale statewide assessment delivered in both English and Spanish. The simulated data were used as a benchmark to compare the Mantel-Haenszel procedure for identifying differential item function (DIF) under the two scenarios with the hope that controlling for distributional differences would reduce the errors made by the Mantel-Haenszel procedure in identifying DIF. With the increase in high-stakes testing of diverse populations in the United States as well as elsewhere in the world, it is critical that effective methods of identifying DIF be developed for situations where the reference and focal groups display distributional differences. However, the evidence of this study suggests that the matched samples did not help the Mantel-Haenszel procedure identify DIF, and in fact increased its errors.
|Advisor:||Cizek, Gregory J.|
|Commitee:||Greene, Jeffrey A., Ware, William B.|
|School:||The University of North Carolina at Chapel Hill|
|School Location:||United States -- North Carolina|
|Source:||MAI 50/01M, Masters Abstracts International|
|Subjects:||Educational tests & measurements|
|Keywords:||Differential item functioning, Mantel-Haenszel procedure, Propensity score matching, Test translations|
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