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CDM (version 4.6-0)

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).

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Version

Install

install.packages('CDM')

Monthly Downloads

3,438

Version

4.6-0

License

GPL (>= 2)

Maintainer

Alexander Robitzsch

Last Published

November 4th, 2015

Functions in CDM (4.6-0)

data.timss03.G8.su

TIMSS 2003 Mathematics 8th Grade (Su et al., 2013)
data.dcm

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

Information Criteria
IRT.data

S3 Method for Extracting Used Item Response Dataset
data.cdm

Several Datasets for the CDM Package
IRT.irfprob

S3 Methods for Extracting Item Response Functions
data.timss07.G4.lee

TIMSS 2007 Mathematics 4th Grade (Lee et al., 2011)
data.melab

MELAB Data (Li, 2011)
entropy.lca

Test-specific and Item-specific Entropy for Latent Class Models
data.dtmr

DTMR Fraction Data (Bradshaw et al., 2014)
IRT.anova

Helper Function for Conducting Likelihood Ratio Tests
Data-sim

Artificial Data: DINA and DINO
din.deterministic

Deterministic Classification and Joint Maximum Likelihood Estimation of the Mixed DINA/DINO Model
data.hr

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

Calculation of Equivalent Skill Classes in the DINA/DINO Model
data.jang

Dataset Jang (2009)
IRT.expectedCounts

S3 Method for Extracting Expected Counts
data.mg

Large-Scale Dataset with Multiple Groups
IRT.compareModels

Comparisons of Several Models
fraction.subtraction.data

Fraction Subtraction Data
anova

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

TIMSS 2011 Mathematics 4th Grade Austrian Students
IRT.jackknife

Jackknifing an Item Response Model
modelfit.cor

Assessing Model Fit and Local Dependence by Comparing Observed and Expected Item Pair Correlations
cdi.kli

Cognitive Diagnostic Indices based on Kullback-Leibler Information
personfit.appropriateness

Appropriateness Statistic for Person Fit Assessment
coef

Extract Estimated Item Parameters and Skill Class Distribution Parameters
CDM-package

Cognitive Diagnosis Modeling: The RPackage CDM
skillspace.hierarchy

Creation of a Hierarchical Skill Space
itemfit.sx2

S-X2 Item Fit Statistic for Dichotomous Data
logLik

Extract Log-Likelihood
din.validate.qmatrix

Q-Matrix Validation (Q-Matrix Modification) for Mixed DINA/DINO Model
skillspace.approximation

Skill Space Approximation
cdm.est.class.accuracy

Classification Reliability in a CDM
sequential.items

Constructing a Dataset with Sequential Pseudo Items for Ordered Item Responses
itemfit.rmsea

RMSEA Item Fit
gdina

Function for Estimating the Generalized DINA (GDINA) Model
IRT.factor.scores

S3 Methods for Extracting Factor Scores (Person Classifications)
gdd

Generalized Distance Discriminating Method
data.fraction2

Fraction Subtraction Dataset 2
data.sda6

Dataset SDA6 (Jurich & Bradshaw, 2014)
equivalent.dina

Determination of a Statistically Equivalent DINA Model
vcov

Asymptotic Covariance Matrix, Standard Errors and Confidence Intervals
IRT.repDesign

Generation of a Replicate Design for IRT.jackknife
din

Parameter Estimation for Mixed DINA/DINO Model
ideal.response.pattern

Ideal Response Pattern
IRT.irfprobPlot

Plot Item Response Functions
data.fraction1

Fraction Subtraction Dataset 1
data.pgdina

Dataset for Polytomous GDINA Model
gdm

General Diagnostic Model
sim.din

Data Simulation Tool for DINA, DINO and mixed DINA and DINO Data
IRT.itemfit

S3 Methods for Computing Item Fit
data.ecpe

Dataset ECPE
IRT.likelihood

S3 Methods for Extracting of the Individual Likelihood and the Individual Posterior
summary.din

Summary Method for Objects of Class din
gdina.wald

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

Structured Latent Class Analysis (SLCA)
print.summary.din

Print Method for Objects of Class summary.din
sim.gdina

Simulation of the GDINA model
fraction.subtraction.qmatrix

Fraction Subtraction Q-Matrix
mcdina

Multiple Choice DINA Model
data.Students

Dataset Student Questionnaire
skill.cor

Tetrachoric or Polychoric Correlations between Attributes
predict

Expected Values and Predicted Probabilities from Item Response Response Models
IRT.modelfit

S3 Methods for Assessing Model Fit
gdina.dif

Differential Item Functioning in the GDINA Model
plot.din

Plot Method for Objects of Class din