Package mirt updated to version 1.46.1 with previous version 1.45.1 dated 2025-09-06

Sat, 07 Mar 2026 01:02:00 CDT

Title: Multidimensional Item Response Theory
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.
Author: Phil Chalmers [aut, cre] , 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 [...truncated...]
Maintainer: Phil Chalmers <rphilip.chalmers@gmail.com>

Diff between mirt versions 1.45.1 dated 2025-09-06 and 1.46.1 dated 2026-03-07

 DESCRIPTION                          |   36 +++---
 MD5                                  |  122 +++++++++++-----------
 NAMESPACE                            |    6 +
 NEWS.md                              |   25 ++++
 R/02a-general_methods.R              |   51 +++++++++
 R/02b-item_methods.R                 |    9 -
 R/03-estimation.R                    |   24 ++--
 R/06-LoadPars.R                      |   16 +--
 R/DIF.R                              |   18 +--
 R/DRF.R                              |   53 +++++++++
 R/M2.R                               |    4
 R/MHRM.group.R                       |   75 ++++++++------
 R/MHRM.utils.R                       |   27 ++---
 R/MultipleGroup-methods.R            |   20 +++
 R/PLCI.mirt.R                        |    4
 R/RCI.R                              |   70 ++++++++++++-
 R/RMSD_DIF.R                         |    2
 R/SingleGroup-methods.R              |   49 ++++++---
 R/averageMI.R                        |    2
 R/boot.LR.R                          |    2
 R/extract.group.R                    |    5
 R/extract.item.R                     |    9 +
 R/extract.mirt.R                     |   20 +++
 R/fscores.R                          |    2
 R/fscores.internal.R                 |   25 ----
 R/itemfit.R                          |   17 ++-
 R/marginal_moments.R                 |only
 R/mdirt.R                            |    9 +
 R/mirt-package.R                     |   37 ++++++
 R/mirt.R                             |  129 ++++++++++++++++++------
 R/mirtCluster.R                      |   69 +++++++++---
 R/multipleGroup.R                    |   89 ++++++++++++++--
 R/read.mirt.R                        |    2
 R/utils.R                            |   70 +++++++++----
 R/wald.R                             |    2
 README.md                            |   13 --
 inst/doc/mirt-vignettes.html         |    2
 man/DIF.Rd                           |    7 -
 man/DRF.Rd                           |   12 +-
 man/LSAT7.Rd                         |   19 +++
 man/PLCI.mirt.Rd                     |    4
 man/RCI.Rd                           |   38 ++++++-
 man/SAT12.Rd                         |   15 ++
 man/boot.LR.Rd                       |    2
 man/extract.item.Rd                  |    5
 man/extract.mirt.Rd                  |   10 +
 man/fscores.Rd                       |    2
 man/head.mirt_matrix.Rd              |only
 man/marginal_moments.Rd              |only
 man/mdirt.Rd                         |    9 +
 man/mirt.Rd                          |  128 ++++++++++++++++++------
 man/mirtCluster.Rd                   |    7 -
 man/multipleGroup.Rd                 |   60 ++++++++++-
 man/plot-method.Rd                   |   10 +
 man/print.mirt_matrix.Rd             |    3
 man/residuals-method.Rd              |    4
 man/tail.mirt_matrix.Rd              |only
 src/Estep.cpp                        |  186 ++++++++++++++++++++++-------------
 src/Makevars                         |    2
 src/Makevars.win                     |    2
 src/traceLinePts.cpp                 |   32 +++---
 tests/testthat/test-01-mirtOne.R     |   12 +-
 tests/testthat/test-05-confmirtOne.R |    9 +
 tests/testthat/test-16-DCIRT.R       |    2
 64 files changed, 1225 insertions(+), 470 deletions(-)

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