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difR (version 5.1)

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

Description

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 ).

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Version

Install

install.packages('difR')

Monthly Downloads

1,635

Version

5.1

License

GPL (>= 2)

Maintainer

David Magis

Last Published

May 13th, 2020

Functions in difR (5.1)

difGMH

Generalized Mantel-Haenszel DIF method
dichoDif

Comparison of DIF detection methods
RajuZ

Raju's area DIF statistic
Logistik

Logistic regression DIF statistic
difGenLogistic

Generalized logistic regression DIF method
LRT

Likelihood-Ratio Test DIF statistic
contrastMatrix

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

Breslow-Day DIF statistic
difBD

Breslow-Day DIF method
difLRT

Likelihood-Ratio Test DIF method
difRaju

Raju's area DIF method
difR-package

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

Mantel-Haenszel DIF method
difStd

Standardization DIF method
difLogReg

General logistic regression DIF method
difTID

Transformed Item Difficulties (TID) DIF method
difLogistic

Logistic regression DIF method
difSIBTEST

SIBTEST and Crossing-SIBTEST DIF method
selectDif

Selection of one of the DIF detection methods
selectGenDif

Selection of one of the DIF detection methods among multiple groups
mantelHaenszel

Mantel-Haenszel DIF statistic
subtestLogistic

Testing for DIF among subgroups with generalized logistic regression
genDichoDif

Comparison of DIF detection methods among multiple groups
verbal

Verbal Aggression Data Set
genLogistik

Generalized logistic regression DIF statistic
itemRescale

Rescaling item parameters by equal means anchoring
itemPar3PLconst

Item parameter estimation for DIF detection using constrained 3PL model
itemParEst

Item parameter estimation for DIF detection
genMantelHaenszel

Generalized Mantel-Haenszel DIF statistic
itemPar1PL

Item parameter estimation for DIF detection using Rasch (1PL) model
itemPar2PL

Item parameter estimation for DIF detection using 2PL model
itemPar3PL

Item parameter estimation for DIF detection using 3PL model
stdPDIF

Standardization DIF statistic
sibTest

SIBTEST DIF statistic