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.
NLR                     Non-Linear Regression DIF statistic
constrNLR               Constraints for Non-Linear Regression Model
ddfMLR                  Performs DDF detection using Multinomial
                        Log-linear Regression model.
difMedical              Dichotomous Data Set of Admission Test to
                        Medical School
difMedicalkey           Key of Correct Answers for 'difMedicaltest'
                        Data Set
difMedicaltest          Data Set of Admission Test to Medical School
difNLR                  Performs DIF detection using Non-Linear
                        Regression method.
difNLR-package          Detection of Dichotomous Differential Item
                        Functioning (DIF) and Differential Distractor
                        Functioning (DDF) by Non-Linear Regression
                        Models
genNLR                  Generates binary data set based on Non-Linear
                        Regression model (generalized logistic
                        regression).
startNLR                Calculates starting values for 'difNLR'
                        function.
