Erroneous detection of nonuniform DIF using the Breslow-Day test in a short test

Erroneous detection of nonuniform DIF using the Breslow-Day test in a short test This paper studies the Type I error rate obtained using the Breslow-Day (BD) test to detect Nonuniform Differential Item Functioning (NUDIF) in a short test when the average ability of one group is significantly higher than that of the other. The performance is compared with the logistic regression (LR) and the standard Mantel-Haenszel procedure (MH). Responses to a 20-item test were simulated without Differential Item Functioning (DIF) according to the three-parameter logistic model. The manipulated factors were sample size and item parameters. The design yielded 40 conditions that were replicated 50 times and the false positive rate at a 5% significance level obtained with the three methods was recorded for each condition. In most cases, BD performed better than LR and MH in terms of proneness to Type I error. With the BD test, the Type I error rate was similar to the nominal one when the item with the highest discrimination and difficulty parameters in the case of equally sized groups was excluded from the goodness-of-fit to the binomial distribution (number of false positives among the fifty replications of a Bernoulli variable with parameter equal to 0.05). Quality & Quantity Springer Journals

Erroneous detection of nonuniform DIF using the Breslow-Day test in a short test

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Springer Netherlands
Copyright © 2007 by Springer Science + Business Media B.V.
Social Sciences; Methodology of the Social Sciences; Social Sciences, general
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