Learn R Programming
⚠️There's a newer version (8.2-6) of this package.Take me there.

CDM (version 4.8-0)

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, the multiple choice DINA model, the general diagnostic model (GDM), the multidimensional linear compensatory item response model and the structured latent class model (SLCA).

Copy Link

Version

Install

install.packages('CDM')

Monthly Downloads

3,438

Version

4.8-0

License

GPL (>= 2)

Maintainer

Alexander Robitzsch

Last Published

March 10th, 2016

Functions in CDM (4.8-0)

CDM-package

Cognitive Diagnosis Modeling: The RPackage CDM
data.dcm

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

S3 Methods for Extracting Item Response Functions
IRT.jackknife

Jackknifing an Item Response Model
data.cdm

Several Datasets for the CDM Package
equivalent.dina

Determination of a Statistically Equivalent DINA Model
cdi.kli

Cognitive Diagnostic Indices based on Kullback-Leibler Information
IRT.modelfit

S3 Methods for Assessing Model Fit
data.timss07.G4.lee

TIMSS 2007 Mathematics 4th Grade (Lee et al., 2011)
din.validate.qmatrix

Q-Matrix Validation (Q-Matrix Modification) for Mixed DINA/DINO Model
entropy.lca

Test-specific and Item-specific Entropy for Latent Class Models
numerical_Hessian

Numerical Computation of the Hessian Matrix
personfit.appropriateness

Appropriateness Statistic for Person Fit Assessment
data.dtmr

DTMR Fraction Data (Bradshaw et al., 2014)
print.summary.din

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

MELAB Data (Li, 2011)
IRT.anova

Helper Function for Conducting Likelihood Ratio Tests
gdd

Generalized Distance Discriminating Method
coef

Extract Estimated Item Parameters and Skill Class Distribution Parameters
IRT.expectedCounts

S3 Method for Extracting Expected Counts
data.jang

Dataset Jang (2009)
IRT.irfprobPlot

Plot Item Response Functions
IRT.data

S3 Method for Extracting Used Item Response Dataset
anova

Likelihood Ratio Test for Model Comparisons
data.timss11.G4.AUT

TIMSS 2011 Mathematics 4th Grade Austrian Students
data.pgdina

Dataset for Polytomous GDINA Model
cdm.est.class.accuracy

Classification Reliability in a CDM
gdina.dif

Differential Item Functioning in the GDINA Model
data.mg

Large-Scale Dataset with Multiple Groups
plot.din

Plot Method for Objects of Class din
sequential.items

Constructing a Dataset with Sequential Pseudo Items for Ordered Item Responses
fraction.subtraction.data

Fraction Subtraction Data
din.deterministic

Deterministic Classification and Joint Maximum Likelihood Estimation of the Mixed DINA/DINO Model
IRT.parameterTable

S3 Method for Extracting a Parameter Table
data.timss03.G8.su

TIMSS 2003 Mathematics 8th Grade (Su et al., 2013)
IRT.factor.scores

S3 Methods for Extracting Factor Scores (Person Classifications)
IRT.IC

Information Criteria
skillspace.approximation

Skill Space Approximation
vcov

Asymptotic Covariance Matrix, Standard Errors and Confidence Intervals
itemfit.sx2

S-X2 Item Fit Statistic for Dichotomous Data
data.Students

Dataset Student Questionnaire
IRT.compareModels

Comparisons of Several Models
logLik

Extract Log-Likelihood
IRT.likelihood

S3 Methods for Extracting of the Individual Likelihood and the Individual Posterior
gdm

General Diagnostic Model
Data-sim

Artificial Data: DINA and DINO
sim.gdina

Simulation of the GDINA model
data.sda6

Dataset SDA6 (Jurich & Bradshaw, 2014)
data.hr

Dataset data.hr (Ravand et al., 2013)
summary.din

Summary Method for Objects of Class din
predict

Expected Values and Predicted Probabilities from Item Response Response Models
osink

Opens and Closes a sink Connection
mcdina

Multiple Choice DINA Model
din

Parameter Estimation for Mixed DINA/DINO Model
modelfit.cor

Assessing Model Fit and Local Dependence by Comparing Observed and Expected Item Pair Correlations
data.fraction1

Fraction Subtraction Dataset 1
skillspace.hierarchy

Creation of a Hierarchical Skill Space
itemfit.rmsea

RMSEA Item Fit
IRT.itemfit

S3 Methods for Computing Item Fit
WaldTest

Wald Test for a Linear Hypothesis
gdina.wald

Wald Statistic for Item Fit of the DINA and ACDM Rule for GDINA Model
slca

Structured Latent Class Analysis (SLCA)
IRT.repDesign

Generation of a Replicate Design for IRT.jackknife
din.equivalent.class

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

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

Fraction Subtraction Q-Matrix
ideal.response.pattern

Ideal Response Pattern
data.fraction2

Fraction Subtraction Dataset 2
skill.cor

Tetrachoric or Polychoric Correlations between Attributes
data.ecpe

Dataset ECPE
sim.din

Data Simulation Tool for DINA, DINO and mixed DINA and DINO Data