Nonparametric Methods for Cognitive Diagnosis

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Documentation for package ‘NPCD’ version 1.0-11

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NPCD-package NPCD: The R Package for Nonparametric Methods for Cognitive Diagnosis
AlphaMLE Maximum likelihood estimation of attribute profile
AlphaNP Nonparametric estimation of attribute profiles
CDL Log-likelihood for cognitive diagnostic models
CDP Probability of correct response for cognitive diagnostic models
Data.DINA Example dataset generated using DINA model
Data.DINO Example dataset generated using DINO model
Data.Qrefine Example dataset used for the 'Qrefine' function
ItemFit Compute item fit statistics for outputs generated by estimation functions in the package
JMLE Joint maximum likelihood estimation of item parameters and examinee attribute profiles
ModelFit Compute overall model fit statistics for outputs generated by estimation functions in the package
ParMLE Maximum likelihood estimation of item parameters for cognitive diagnostic models.
plot.AlphaMLE Produce diagnostic plots
plot.AlphaNP Produce diagnostic plots
plot.JMLE Produce diagnostic plots
plot.Qrefine Produce diagnostic plots
print.AlphaMLE Print outputs generated from the functions in the package.
print.AlphaNP Print outputs generated from the functions in the package.
print.JMLE Print outputs generated from the functions in the package.
print.ParMLE Print outputs generated from the functions in the package.
print.Qrefine Print outputs generated from the functions in the package.
Qrefine Refine the Q-matrix by minimizing the residual sum of square (RSS)