A Comparison of Strategies for Estimating Conditional DIF

Tim Moses, Jing Miao and Neil J. Dorans

Journal of Educational and Behavioral Statistics, 2010, vol. 35, issue 6, 726-743

Abstract: In this study, the accuracies of four strategies were compared for estimating conditional differential item functioning (DIF), including raw data, logistic regression, log-linear models, and kernel smoothing. Real data simulations were used to evaluate the estimation strategies across six items, DIF and No DIF situations, and four sample size combinations for the reference and focal group data. Results showed that logistic regression was the most recommended strategy in terms of the bias and variability of its estimates. The log-linear models strategy had flexibility advantages, but these advantages only offset the greater variability of its estimates when sample sizes were large. Kernel smoothing was the least accurate of the considered strategies due to estimation problems when the reference and focal groups differed in overall ability.

Keywords: differential item functioning; research methodology; statistics (search for similar items in EconPapers)
Date: 2010
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://journals.sagepub.com/doi/10.3102/1076998610379135 (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:sae:jedbes:v:35:y:2010:i:6:p:726-743

DOI: 10.3102/1076998610379135

Access Statistics for this article

More articles in Journal of Educational and Behavioral Statistics
Bibliographic data for series maintained by SAGE Publications ().