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CDM (version 1.4-16)

Cognitive Diagnosis Modeling

Description

Functions for cognitive diagnosis modeling and multidimensional item response modeling for dichotomous and polytomous data. This package enables the estimation of the DINA and DINO model, the multiple group GDINA model and the general diagnostic model (GDM) which contains the multidimensional linear compensatory item response model as a special case.

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Version

Install

install.packages('CDM')

Monthly Downloads

3,438

Version

1.4-16

License

GPL (>= 2)

Maintainer

Alexander Robitzsch

Last Published

July 1st, 2013

Functions in CDM (1.4-16)

summary.gdina

Summary Method for Objects of Class gdina
CDM-internal

Internal CDM Functions
fraction.subtraction.qmatrix

Fraction Subtraction Q-Matrix
anova.din

Likelihood Ratio Test for Model Comparisons
itemfit.rmsea

RMSEA Item Fit
gdm

General Diagnostic Model
CDM-package

Cognitive Diagnosis Modeling: The R Package CDM
sim.din

Data Simulation Tool for DINA, DINO and mixed DINA and DINO Data
data.fraction2

Fraction Subtraction Dataset 2
print.summary.din

Print Method for Objects of Class summary.din
modelfit.cor

Assessing Model Fit by Comparing Observed and Expected Item Pair Correlations
sim.gdina

Simulation of the GDINA model
coef

Extract Estimated Item Parameters
plot.din

Plot Method for Objects of Class din
din.equivalent.class

Calculation of Equivalent Skill Classes in the DINA/DINO Model
summary.din

Summary Method for Objects of Class din
data.Students

Dataset Student Questionnaire
equivalent.dina

Determination of a Statistically Equivalent DINA Model
data.fraction1

Fraction Subtraction Dataset 1
skill.cor

Tetrachoric correlations between attributes
Data-sim

Artificial Data: DINA and DINO
cdm.est.class.accuracy

Classification Reliability in a CDM
din

Main Function for Parameter Estimation in Cognitive Diagnosis Models
gdina

Function for Estimating the Generalized DINA (GDINA) Model
fraction.subtraction.data

Fraction Subtraction Data
summary.gdm

Summary Method for Objects of Class gdm
logLik

Extract Log-Likelihood
print.din

Print Method for Objects of Class din