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CDM (version 2.4-9)

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 (polytomous) 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

5,591

Version

2.4-9

License

GPL (>= 2)

Maintainer

Alexander Robitzsch

Last Published

October 24th, 2013

Functions in CDM (2.4-9)

CDM-package

Cognitive Diagnosis Modeling: The RPackage CDM
data.fraction1

Fraction Subtraction Dataset 1
itemfit.rmsea

RMSEA Item Fit
data.ecpe

Dataset ECPE
data.dcm

Dataset from Book 'Diagnostic Measurement' of Rupp, Templin and Henson (2010)
modelfit.cor

Assessing Model Fit by Comparing Observed and Expected Item Pair Correlations
print.summary.din

Print Method for Objects of Class summary.din
data.Students

Dataset Student Questionnaire
din

Parameter Estimation for Mixed DINA/DINO Model
data.pgdina

Dataset for Polytomous GDINA Model
print.din

Print Method for Objects of Class din
sim.din

Data Simulation Tool for DINA, DINO and mixed DINA and DINO Data
plot.din

Plot Method for Objects of Class din
data.fraction2

Fraction Subtraction Dataset 2
data.mg

Large-Scale Dataset with Multiple Groups
gdm

General Diagnostic Model
logLik

Extract Log-Likelihood
gdina

Function for Estimating the Generalized DINA (GDINA) Model
anova.din

Likelihood Ratio Test for Model Comparisons
summary.din

Summary Method for Objects of Class din
fraction.subtraction.data

Fraction Subtraction Data
equivalent.dina

Determination of a Statistically Equivalent DINA Model
cdm.est.class.accuracy

Classification Reliability in a CDM
din.equivalent.class

Calculation of Equivalent Skill Classes in the DINA/DINO Model
coef

Extract Estimated Item Parameters
din.deterministic

Deterministic Classification and Joint Maximum Likelihood Estimation of the Mixed DINA/DINO Model
skill.cor

Tetrachoric Correlations between Attributes
din.validate.qmatrix

Q-Matrix Validation (Q-Matrix Modification) for Mixed DINA/DINO Model
fraction.subtraction.qmatrix

Fraction Subtraction Q-Matrix
Data-sim

Artificial Data: DINA and DINO
CDM-internal

Internal CDM Functions
sim.gdina

Simulation of the GDINA model