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

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Documentation for package ‘difR’ version 6.0.0

• DESCRIPTION file.
• Package NEWS.

Help Pages

difR-package	Collection of methods to detect dichotomous and polytomous differential item functioning (DIF) in psychometrics
breslowDay	Breslow-Day DIF statistic
contrastMatrix	Contrast matrix for computing generalized Lord's chi-squared DIF statistic
dichoDif	Comparison of DIF detection methods
difBD	Breslow-Day DIF method
difGenLogistic	Generalized logistic regression DIF method
difGenLord	Generalized Lord's chi-squared DIF method
difGMH	Generalized Mantel-Haenszel DIF method
difLogistic	Logistic regression DIF method
difLogReg	General logistic regression DIF method
difLord	Lord's chi-squared DIF method
difLRT	Likelihood-Ratio Test DIF method
difMantel.poly	Mantel Differential Item Functionning Detection for Polytomous Items
difMH	Mantel-Haenszel DIF method
difPolyLogistic	Logistic regression DIF statistics for polytomous (ordinal) items
difQuade	Detection of Differential Item Functioning Using Quade-Type Association Indices for Polytomous (Ordinal) Item
difR	Collection of methods to detect dichotomous and polytomous differential item functioning (DIF) in psychometrics
difRaju	Raju's area DIF method
difSIBTEST	SIBTEST and Crossing-SIBTEST DIF method
difStd	Standardization DIF method
difTID	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
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
itemPar3PLconst	Item parameter estimation for DIF detection using constrained 3PL model
itemParEst	Item parameter estimation for DIF detection
itemRescale	Rescaling item parameters by equal means anchoring
LassoData	Rearrange the data matrix for the Detection of DIF using the Lasso Approach (Magis et al. (2015)
lassoDIF.ABWIC	Detection of Differential Item Functioning Using the Lasso Approach: Selection of Optimal lambda Value
lassoDIF.CV	Detection of Differential Item Functioning Using the Lasso Approach: Selection of Optimal lambda via Cross-Validation
liu_agresti_ccor	Liu-Agresti Common Cumulative Odds Ratio
Logistik	Logistic regression DIF statistic
LogistikPoly	Detection of DIF in polytomous (ordinal) items using cumulative logistic regression
LordChi2	Lord's chi-square DIF statistic
LRT	Likelihood-Ratio Test DIF statistic
mantelHaenszel	Mantel-Haenszel DIF statistic
plot.BD	Breslow-Day DIF method
plot.difQuade	Detection of Differential Item Functioning Using Quade-Type Association Indices for Polytomous (Ordinal) Item
plot.genLogistic	Generalized logistic regression DIF method
plot.GenLord	Generalized Lord's chi-squared DIF method
plot.GMH	Generalized Mantel-Haenszel DIF method
plot.Logistic	Logistic regression DIF method
plot.Lord	Lord's chi-squared DIF method
plot.LRT	Likelihood-Ratio Test DIF method
plot.MH	Mantel-Haenszel DIF method
plot.PDIF	Standardization DIF method
plot.Raj	Raju's area DIF method
plot.SIBTEST	SIBTEST and Crossing-SIBTEST DIF method
plot.TID	Transformed Item Difficulties (TID) DIF method
plot_lasso_paths	Plot coefficient paths from LASSO DIF
print.BD	Breslow-Day DIF method
print.dichoDif	Comparison of DIF detection methods
print.difQuade	Detection of Differential Item Functioning Using Quade-Type Association Indices for Polytomous (Ordinal) Item
print.genDichoDif	Comparison of DIF detection methods among multiple groups
print.genLogistic	Generalized logistic regression DIF method
print.GenLord	Generalized Lord's chi-squared DIF method
print.GMH	Generalized Mantel-Haenszel DIF method
print.Logistic	Logistic regression DIF method
print.Lord	Lord's chi-squared DIF method
print.LRT	Likelihood-Ratio Test DIF method
print.MH	Mantel-Haenszel DIF method
print.PDIF	Standardization DIF method
print.Raj	Raju's area DIF method
print.SIBTEST	SIBTEST and Crossing-SIBTEST DIF method
print.subLogistic	Testing for DIF among subgroups with generalized logistic regression
print.TID	Transformed Item Difficulties (TID) DIF method
RajuZ	Raju's area DIF statistic
SCS	Sexual Compulsivity Scale Data Set
selectDif	Selection of one of the DIF detection methods
selectGenDif	Selection of one of the DIF detection methods among multiple groups
sibTest	SIBTEST DIF statistic
SimDichoDif	Generation of DIF for dichotomous items
SimPolyDif	Generation of DIF for polytomous items
stdPDIF	Standardization DIF statistic
subtestLogistic	Testing for DIF among subgroups with generalized logistic regression
verbal	Verbal Aggression Data Set