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difR

Collection of Methods to Detect Dichotomous Differential Item Functioning (DIF)

Provides a collection of standard methods to detect differential item functioning among dichotomously scored items. Methods for uniform and non-uniform DIF, based on test-score or IRT methods, for comparing two or more than two groups of respondents, are available (Magis, Beland, Tuerlinckx and De Boeck,A General Framework and an R Package for the Detection of Dichotomous Differential Item Functioning, Behavior Research Methods, 42, 2010, 847-862 <doi:10.3758/BRM.42.3.847>).

Functions (38)

LRT

Likelihood-Ratio Test DIF statistic

Logistic regression DIF statistic

Lord's chi-square DIF statistic

Raju's area DIF statistic

Breslow-Day DIF statistic

contrastMatrix

Contrast matrix for computing generalized Lord's chi-squared DIF statistic

Comparison of DIF detection methods

Breslow-Day DIF method

Generalized Mantel-Haenszel DIF method

difGenLogistic

Generalized logistic regression DIF method

Generalized Lord's chi-squared DIF method

Likelihood-Ratio Test DIF method

General logistic regression DIF method

difLogistic

Logistic regression DIF method

Lord's chi-squared DIF method

Mantel-Haenszel DIF method

difR-package

Collection of methods to detect dichotomous differential item functioning (DIF) in psychometrics

Raju's area DIF method

SIBTEST and Crossing-SIBTEST DIF method

Standardization DIF method

Transformed Item Difficulties (TID) DIF method

genDichoDif

Comparison of DIF detection methods among multiple groups

genLogistik

Generalized logistic regression DIF statistic

genLordChi2

Generalized Lord's chi-squared DIF statistic

genMantelHaenszel

Generalized Mantel-Haenszel DIF statistic

Item parameter estimation for DIF detection using Rasch (1PL) model

Item parameter estimation for DIF detection using 2PL model

Item parameter estimation for DIF detection using 3PL model

itemPar3PLconst

Item parameter estimation for DIF detection using constrained 3PL model

Item parameter estimation for DIF detection

itemRescale

Rescaling item parameters by equal means anchoring

mantelHaenszel

Mantel-Haenszel DIF statistic

Selection of one of the DIF detection methods

selectGenDif

Selection of one of the DIF detection methods among multiple groups

SIBTEST DIF statistic

Standardization DIF statistic

subtestLogistic

Testing for DIF among subgroups with generalized logistic regression

Verbal Aggression Data Set

difR

Collection of Methods to Detect Dichotomous Differential Item Functioning (DIF)

v5.1

GPL (>= 2)

Authors

David Magis (U Liege), Sebastien Beland (U Montreal) and Gilles Raiche (UQAM)

Initial release

2020-05-10

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