Nonparametric Methods for Cognitive Diagnosis

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Documentation for package ‘NPCD’ version 1.0-1

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AlphaMLE Maximum likelihood estimation of attribute profile
AlphaNP Nonparametric estimation of attribute profiles
CDL Log-likelihood for cognitive diagnostic models
Data.DINA Example dataset generated using DINA model
Data.DINO Example dataset generated using DINO model
Data.NIDA Example dataset generated using NIDA model
Data.Qrefine Example dataset used for the 'Qrefine' function
JMLE Joint maximum likelihood estimation of item parameters and examinee attribute profiles
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
Qrefine Refine the Q-matrix by minimizing the residual sum of square (RSS)