DIF and DDF Detection by Non-Linear Regression Models
Extract model coefficients from an object of "ddfMLR" class.
Extract item parameter estimates from an object of the "difNLR" clas...
Extract model coefficients from an object of "difORD" class.
DDF detection for nominal data.
DIF and DDF Detection by Non-Linear Regression Models.
DIF detection using non-linear regression method.
DIF detection among ordinal data.
Non-linear regression DIF models estimation.
Creates a formula for non-linear regression DIF models.
Generates data set based on generalized logistic regression DIF and DD...
Log-likelihood and information criteria for an object of "ddfMLR" cl...
Log-likelihood and information criteria for an object of the `"difNLR"...
Log-likelihood and information criteria for an object of "difORD" cl...
DDF likelihood ratio statistics based on multinomial log-linear regres...
DIF statistics for non-linear regression models.
DIF likelihood ratio statistics for ordinal data.
ICC plots for an object of "ddfMLR" class.
ICC and test statistics plots for an object of the "difNLR" class.
ICC plots for an object of "difORD" class.
Predicted values for an object of "ddfMLR" class.
Predicted values for an object of the "difNLR" class.
Predicted values for an object of "difORD" class.
Fitted values and residuals for an object of the "difNLR" class.
Calculates starting values for non-linear regression DIF models.
Detection of differential item functioning (DIF) among dichotomously scored items and differential distractor functioning (DDF) among unscored items with non-linear regression procedures based on generalized logistic regression models (Hladka & Martinkova, 2020, <doi:10.32614/RJ-2020-014>).