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mirt (version 0.2.6)

Multidimensional Item Response Theory

Description

Analysis of dichotomous and polychotomous response data using latent trait models under the Item Response Theory paradigm. Includes the multivariate two- and three-parameter logistic models, confirmatory bifactor analysis, polytomous exploratory and confirmatory item response models which may include polynomial or product constructed factors, and partially-compensatory item response modeling in conjunction with other IRT models.

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Install

install.packages('mirt')

Monthly Downloads

7,762

Version

0.2.6

License

GPL (>= 2)

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Maintainer

Phil Chalmers

Last Published

July 15th, 2012

Functions in mirt (0.2.6)

Science

Description of Science data
logLik

Monte Carlo Log-Likelihood Calculation
simdata

Simulate response patterns from an underlying multivariate normal distribution
mirtClass-class

Class "mirtClass"
itemplot

Displays item surface and information plots
expand.table

Expand summary table of patterns and frequencies
bfactorClass-class

Class "bfactorClass"
key2binary

Convert response patterns to binary data
polymirt

Full-Information Item Factor Analysis for Mixed Data Formats
confmirt

Confirmatory Full-Information Item Factor Analysis for Mixed Data Formats
read.mirt

Translate mirt parameters for plink package
fscores

Methods for Function fscores
polymirtClass-class

Class "polymirtClass"
LSAT7

Description of LSAT7 data
SAT12

Description of SAT12 data
confmirt.model

Specify confirmatory loadings
mirt

Full-Information Item Factor Analysis (Multidimensional Item Response Theory)
mirt-package

Full information maximum likelihood estimation of IRT models.
bfactor

Full-Information Item Bifactor Analysis
confmirtClass-class

Class "confmirtClass"