Package: mirt
Version: 1.46.8
Type: Package
Title: Multidimensional Item Response Theory
Authors@R: c( person("Phil", family="Chalmers", email =
                     "rphilip.chalmers@gmail.com", role = c("aut", "cre"),
                     comment = c(ORCID="0000-0001-5332-2810")),
    person("Joshua", family="Pritikin", role=c('ctb')),
    person("Alexander", family="Robitzsch", role=c('ctb')),
    person("Mateusz", family="Zoltak", role=c('ctb')),
    person("KwonHyun", family="Kim", role=c('ctb')),
    person("Carl F.", family="Falk", role=c('ctb')),
    person("Adam", family="Meade", role=c('ctb')),
    person("Lennart", family="Schneider", role=c('ctb')),
    person("David", family="King", role=c('ctb')),
    person("Chen-Wei", family="Liu", role=c('ctb')),
    person("Ogreden", family="Oguzhan", role=c('ctb')),
    person("Samuel", family="Huang", role=c('ctb')))
Description: Analysis of discrete response data using unidimensional
        and multidimensional item analysis models under the Item
        Response Theory paradigm (Chalmers (2012)
        <doi:10.18637/jss.v048.i06>). Exploratory and confirmatory item
        factor analysis models are estimated with quadrature (EM) or
        stochastic (MHRM) methods. Confirmatory bi-factor and two-tier
        models are available for modeling item testlets using dimension
        reduction EM algorithms, while multiple group analyses and
        mixed effects designs are included for detecting differential
        item, bundle, and test functioning, and for modeling item and
        person covariates. Finally, latent class models such as the
        DINA, DINO, multidimensional latent class, mixture IRT models,
        and zero-inflated response models are supported, as well as a
        wide family of probabilistic unfolding models.
VignetteBuilder: knitr
Depends: stats, R (>= 4.1.0), stats4, lattice, methods
Imports: GPArotation, gridExtra, Matrix (>= 1.5-0), Rcpp, mgcv, vegan,
        Deriv, splines, splines2, pbapply (>= 1.3-0), dcurver,
        SimDesign
Suggests: boot, parallel, mirai, latticeExtra, directlabels, shiny,
        knitr, markdown, Rsolnp, nloptr, sirt, plink, mirtCAT, testthat
        (>= 3.0.0)
ByteCompile: yes
LazyLoad: yes
LazyData: yes
LinkingTo: Rcpp, RcppArmadillo
License: GPL (>= 3)
Encoding: UTF-8
Maintainer: Phil Chalmers <rphilip.chalmers@gmail.com>
URL: https://philchalmers.github.io/mirt/,
        https://github.com/philchalmers/mirt/wiki,
        https://groups.google.com/forum/#!forum/mirt-package
BugReports: https://github.com/philchalmers/mirt/issues?state=open
Config/testthat/edition: 3
Config/roxygen2/version: 8.0.0
Config/pak/sysreqs: cmake make libuv1-dev libx11-dev
Repository: https://philchalmers.r-universe.dev
Date/Publication: 2026-06-30 00:15:44 UTC
RemoteUrl: https://github.com/philchalmers/mirt
RemoteRef: HEAD
RemoteSha: 14bbb3780ead70b9a3e68a35435d567df0d43529
NeedsCompilation: yes
Packaged: 2026-06-30 03:07:36 UTC; root
Author: Phil Chalmers [aut, cre] (ORCID:
    <https://orcid.org/0000-0001-5332-2810>),
  Joshua Pritikin [ctb],
  Alexander Robitzsch [ctb],
  Mateusz Zoltak [ctb],
  KwonHyun Kim [ctb],
  Carl F. Falk [ctb],
  Adam Meade [ctb],
  Lennart Schneider [ctb],
  David King [ctb],
  Chen-Wei Liu [ctb],
  Ogreden Oguzhan [ctb],
  Samuel Huang [ctb]