GMAT                    Dichotomous Data Set Based on Graduate
                        Management Admission Test with the Same Total
                        Score Distribution for Groups
GMAT2                   Dichotomous Data Set Based on Graduate
                        Management Admission Test
GMAT2key                Key of Correct Answers for 'GMAT2test' Data Set
GMAT2test               Data Set Based on Graduate Management Admission
                        Test
GMATkey                 Key of Correct Answers for 'GMATtest' Data Set
GMATtest                Data Set Based on Graduate Management Admission
                        Test with the Same Total Score Distribution for
                        Groups
MLR                     DDF likelihood ratio statistics based on
                        Multinomial Log-linear Regression model.
MSATB                   Dichotomous Data Set of Medical School
                        Admission Test in Biology
MSATBkey                Key of Correct Answers for 'MSATBtest' Data Set
MSATBtest               Data Set of School Admission Test in Biology
NLR                     Non-Linear Regression DIF statistic.
checkInterval           Checks interval bounds.
ddfMLR                  Performs DDF detection using Multinomial
                        Log-linear Regression model.
difNLR                  Performs DIF detection using Non-Linear
                        Regression method.
difNLR-package          DIF and DDF Detection by Non-Linear Regression
                        Models.
estimNLR                Non-Linear Regression DIF models estimation.
formulaNLR              Formula for Non-Linear Regression DIF model.
genNLR                  Generates data set based on Non-Linear
                        Regression DIF a DDF models.
plot.difNLR             ICC and test statistics plots for difNLR object
predict.difNLR          Predicted values for difNLR object
startNLR                Calculates starting values for Non-Linear
                        Regression DIF models.
