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difR (version 5.0)

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

1,780

Version

5.0

License

GPL (>= 2)

Maintainer

David Magis

Last Published

May 14th, 2018

Functions in difR (5.0)

RajuZ

Raju's area DIF statistic
breslowDay

Breslow-Day DIF statistic
difLRT

Likelihood-Ratio Test DIF method
difGenLogistic

Generalized logistic regression DIF method
LRT

Likelihood-Ratio Test DIF statistic
contrastMatrix

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

Logistic regression DIF statistic
dichoDif

Comparison of DIF detection methods
difLogReg

General logistic regression DIF method
difBD

Breslow-Day DIF method
difGMH

Generalized Mantel-Haenszel DIF method
genDichoDif

Comparison of DIF detection methods among multiple groups
difLogistic

Logistic regression DIF method
genLogistik

Generalized logistic regression DIF statistic
difRaju

Raju's area DIF method
difSIBTEST

SIBTEST and Crossing-SIBTEST DIF method
selectGenDif

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

Selection of one of the DIF detection methods
genMantelHaenszel

Generalized Mantel-Haenszel DIF statistic
itemPar2PL

Item parameter estimation for DIF detection using 2PL model
itemPar1PL

Item parameter estimation for DIF detection using Rasch (1PL) model
itemPar3PL

Item parameter estimation for DIF detection using 3PL model
sibTest

SIBTEST DIF statistic
difMH

Mantel-Haenszel DIF method
stdPDIF

Standardization DIF statistic
difR-package

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

Standardization DIF method
difTID

Transformed Item Difficulties (TID) DIF method
itemRescale

Rescaling item parameters by equal means anchoring
mantelHaenszel

Mantel-Haenszel DIF statistic
itemPar3PLconst

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

Item parameter estimation for DIF detection
subtestLogistic

Testing for DIF among subgroups with generalized logistic regression
verbal

Verbal Aggression Data Set