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Testing Differential Item Functioning in Small Samples
Multivariate Behavioral Research, 2019Differential item functioning (DIF) is a pernicious statistical issue that can mask true group differences on a target latent construct. A considerable amount of research has focused on evaluating methods for testing DIF, such as using likelihood ratio tests in item response theory (IRT).
William C. M. Belzak
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Testing Differential Item Functioning Without Predefined Anchor Items Using Robust Regression
Journal of educational and behavioral statistics, 2022Differential item functioning (DIF) occurs when the probability of endorsing an item differs across groups for individuals with the same latent trait level.
Weimeng Wang, Yang Liu, Hongyun Liu
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Estimating the Importance of Differential Item Functioning [PDF]
Journal of Educational and Behavioral Statistics, 1995 Several methods have been proposed to detect differential item functioning (DIF), an item response pattern in which members of different demographic groups have different conditional probabilities of answering a test item correctly, given the same level of ability. In this article, the mixture index of fit, proposed by Rudas, Clogg, and Lindsay (1994)
Tamás Rudas, Rebecca Zwick
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Differential item functioning and health assessment [PDF]
Quality of Life Research, 2007 Establishing measurement equivalence is important because inaccurate assessment may lead to incorrect estimates of effects in research, and to suboptimal decisions at the individual, clinical level. Examination of differential item functioning (DIF) is a method for studying measurement equivalence.
John A. Fleishman, Jeanne A. Teresi
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Encyclopedia of Personality and Individual Differences, 2017
Eunike Wetzel, Jan R. Böhnke
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Eunike Wetzel, Jan R. Böhnke
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Differential Item Functioning in rehabilitation research
Work, 2010Measurement is critical to Rehabilitation practice and research. To provide effective services and to have valid research results, it is imperative to have valid and reliable assessment tools. Differential Item Functioning (DIF) is a statistical procedure which better enables us to assess both the validity and the results of measurement instruments. As
Phillip D. Rumrill +2 more
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Screening Test Items for Differential Item Functioning [PDF]
Journal of Educational and Behavioral Statistics, 2014 A method for medical screening is adapted to differential item functioning (DIF). Its essential elements are explicit declarations of the level of DIF that is acceptable and of the loss function that quantifies the consequences of the two kinds of inappropriate classification of an item.
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2016
For every IRT model, a mathematical function is used to specify the probability of item responses as a function of the ability (latent trait). The degree to which the observed data fit the mathematical function needs to be examined since valid results can only be drawn if the data fit the model.
Margaret Wu, Tsung-Hau Jen, Hak Ping Tam
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For every IRT model, a mathematical function is used to specify the probability of item responses as a function of the ability (latent trait). The degree to which the observed data fit the mathematical function needs to be examined since valid results can only be drawn if the data fit the model.
Margaret Wu, Tsung-Hau Jen, Hak Ping Tam
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International Journal of Testing, 2015
Raju, van der Linden, and Fleer (1995) introduced a framework for differential functioning of items and tests (DFIT) for unidimensional dichotomous models. Since then, DFIT has been shown to be a quite versatile framework as it can handle polytomous as well as multidimensional models both at the item and test levels.
T. C. Oshima, Keith Wright, Nick White
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Raju, van der Linden, and Fleer (1995) introduced a framework for differential functioning of items and tests (DFIT) for unidimensional dichotomous models. Since then, DFIT has been shown to be a quite versatile framework as it can handle polytomous as well as multidimensional models both at the item and test levels.
T. C. Oshima, Keith Wright, Nick White
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On the Relationship Between Differential Item Functioning and Item Difficulty
Educational and Psychological Measurement, 2011The relationship between differential item functioning (DIF) and item difficulty on the SAT is such that more difficult items tended to exhibit DIF in favor of the focal group (usually minority groups). These results were reported by Kulick and Hu, and Freedle and have been enthusiastically discussed by more recent literature.
Veronica Santelices, Maria, Wilson, Mark
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