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mirt (version 0.1-18)

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 confirmatory and exploratory item response models, and partially-compensatory item response modeling in conjunction with other IRT models.

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Version

Install

install.packages('mirt')

Monthly Downloads

17,786

Version

0.1-18

License

GPL (>= 2)

Maintainer

Phil Chalmers

Last Published

October 14th, 2011

Functions in mirt (0.1-18)

fscores

Compute factor scores
Science

Description of Science data
confmirtClass-class

Class "confmirtClass"
LSAT7

Description of LSAT7 data
bfactorClass-class

Class "bfactorClass"
polymirtClass-class

Class "polymirtClass"
expand.table

Expand summary table of patterns and frequencies
key2binary

Convert response patterns to binary data
logLik

Monte Carlo Log-Likelihood Calculation
polymirt

Full-Information Item Factor Analysis for Mixed Data Formats
simdata

Simulate response patterns from an underlying multivariate normal distribution
logLik-methods

Methods for Function logLik
itemplot-methods

Methods for Function itemplot
bfactor

Full-Information Item Bifactor Analysis
fscores-methods

Methods for Function fscores
mirtClass-class

Class "mirtClass"
itemplot

Displays item surface and information plots
confmirt.model

Specify confirmatory loadings
mirt

Full-Information Item Factor Analysis (Multidimensional Item Response Theory)
SAT12

Description of SAT12 data
confmirt

Confirmatory Full-Information Item Factor Analysis for Mixed Data Formats