# DIF and DDF Detection by Non-Linear Regression Models

## Documentation for package ‘difNLR’ version 1.3.2

- DESCRIPTION file.

## Help Pages

difNLR-package | DIF and DDF Detection by Non-Linear Regression Models.
AIC.ddfMLR | DDF detection for nominal data.
AIC.difNLR | DIF detection using non-linear regression method.
AIC.difORD | DIF detection for ordinal data.
BIC.ddfMLR | DDF detection for nominal data.
BIC.difNLR | DIF detection using non-linear regression method.
BIC.difORD | DIF detection for ordinal data.
checkInterval | Checks interval bounds.
coef.ddfMLR | DDF detection for nominal data.
coef.difNLR | DIF detection using non-linear regression method.
coef.difORD | DIF detection for ordinal data.
ddfMLR | DDF detection for nominal data.
difNLR | DIF detection using non-linear regression method.
difORD | DIF detection for ordinal data.
estimNLR | Non-Linear Regression DIF models estimation.
fitted.difNLR | DIF detection using non-linear regression method.
formulaNLR | Formula for non-linear regression DIF model.
genNLR | Generates data set based on generalized logistic regression DIF and DDF models.
GMAT | Dichotomous dataset based on GMAT with the same total score distribution for groups.
GMAT2 | Dichotomous dataset based on GMAT.
GMAT2key | Key of correct answers for 'GMAT2test' dataset.
GMAT2test | Dataset based on GMAT.
GMATkey | Key of correct answers for 'GMATtest' dataset.
GMATtest | Dataset based on GMAT with the same total score distribution for groups.
logLik.ddfMLR | DDF detection for nominal data.
logLik.difNLR | DIF detection using non-linear regression method.
logLik.difORD | DIF detection for ordinal data.
MLR | DDF likelihood ratio statistics based on multinomial log-linear regression model.
MSATB | Dichotomous dataset of Medical School Admission Test in Biology.
MSATBkey | Key of correct answers for 'MSATBtest' dataset.
MSATBtest | Dataset of School Admission Test in Biology.
NLR | DIF statistics based on non-linear regression model.
ORD | DIF likelihood ratio statistics for ordinal data.
plot.ddfMLR | DDF detection for nominal data.
plot.difNLR | ICC and test statistics plots for '"difNLR"' object.
plot.difORD | DIF detection for ordinal data.
predict.difNLR | Predicted values for '"difNLR"' object.
print.ddfMLR | DDF detection for nominal data.
print.difNLR | DIF detection using non-linear regression method.
print.difORD | DIF detection for ordinal data.
resid.difNLR | DIF detection using non-linear regression method.
residuals.difNLR | DIF detection using non-linear regression method.
startNLR | Calculates starting values for non-linear regression DIF models.
_PACKAGE | DIF and DDF Detection by Non-Linear Regression Models.