Collection of Methods to Detect Dichotomous and Polytomous Differential Item Functioning (DIF)
Breslow-Day DIF statistic
Contrast matrix for computing generalized Lord's chi-squared DIF stati...
Comparison of DIF detection methods
Breslow-Day DIF method
Generalized logistic regression DIF method
Generalized Lord's chi-squared DIF method
Generalized Mantel-Haenszel DIF method
Logistic regression DIF method
General logistic regression DIF method
Lord's chi-squared DIF method
Likelihood-Ratio Test DIF method
Mantel Differential Item Functionning Detection for Polytomous Items
Mantel-Haenszel DIF method
Logistic regression DIF statistics for polytomous (ordinal) items
Detection of Differential Item Functioning Using Quade-Type Associatio...
Collection of methods to detect dichotomous and polytomous differentia...
Raju's area DIF method
SIBTEST and Crossing-SIBTEST DIF method
Standardization DIF method
Transformed Item Difficulties (TID) DIF method
Comparison of DIF detection methods among multiple groups
Generalized logistic regression DIF statistic
Generalized Lord's chi-squared DIF statistic
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
Item parameter estimation for DIF detection using constrained 3PL mode...
Item parameter estimation for DIF detection
Rescaling item parameters by equal means anchoring
Rearrange the data matrix for the Detection of DIF using the Lasso App...
Detection of Differential Item Functioning Using the Lasso Approach: S...
Detection of Differential Item Functioning Using the Lasso Approach: S...
Liu-Agresti Common Cumulative Odds Ratio
Logistic regression DIF statistic
Detection of DIF in polytomous (ordinal) items using cumulative logist...
Lord's chi-square DIF statistic
Likelihood-Ratio Test DIF statistic
Mantel-Haenszel DIF statistic
Plot coefficient paths from LASSO DIF
Raju's area DIF statistic
Selection of one of the DIF detection methods
Selection of one of the DIF detection methods among multiple groups
SIBTEST DIF statistic
Generation of DIF for dichotomous items
Generation of DIF for polytomous items
Standardization DIF statistic
Testing for DIF among subgroups with generalized logistic regression
Methods to detect differential item functioning (DIF) in dichotomous and polytomous items, using both classical and modern approaches. These include Mantel-Haenszel procedures, logistic regression (including ordinal models), and regularization-based methods such as LASSO. Uniform and non-uniform DIF effects can be detected, and some methods support multiple focal groups. The package also provides tools for anchor purification, rest score matching, effect size estimation, and DIF simulation. See Magis, Beland, Tuerlinckx, and De Boeck (2010, Behavior Research Methods, 42, 847–862, <doi:10.3758/BRM.42.3.847>) for a general overview.