irtQ

1.1.0

Unidimensional Item Response Theory Modeling

1packages depend

3.3Kdownloads / year

34.5%test coverage

13/13checks pass

Overview

About

Maintained by Hwanggyu LimFirst published 2023-01-106 releasesCRAN page ↗GitHub ↗

Fit unidimensional item response theory (IRT) models to test data, which includes both dichotomous and polytomous items, calibrate pretest item parameters, estimate examinees' abilities, and examine the IRT model-data fit on item-level in different ways as well as provide useful functions related to IRT analyses such as IRT model-data fit evaluation and differential item functioning analysis. The bring.flexmirt() and write.flexmirt() functions were written by modifying the read.flexmirt() function (Pritikin & Falk (2022) doi:10.1177/0146621620929431). The bring.bilog() and bring.parscale() functions were written by modifying the read.bilog() and read.parscale() functions, respectively (Weeks (2010) doi:10.18637/jss.v035.i12). The bisection() function was written by modifying the bisection() function (Howard (2017, ISBN:9780367657918)). The code of the inverse test characteristic curve scoring in the est_score() function was written by modifying the irt.eq.tse() function (González (2014) doi:10.18637/jss.v059.i07). In est_score() function, the code of weighted likelihood estimation method was written by referring to the Pi(), Ji(), and Ii() functions of the catR package (Magis & Barrada (2017) doi:10.18637/jss.v076.c01).

Install

R (CRAN)pak (dev)Ubuntu (r2u)openSUSE (OBS)

install.packages("irtQ", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("hwangQ/irtQ")

Development version from hwangQ/irtQ. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-irtq

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-irtQ

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 9.2 min · r-devel-linux-x86_64-fedora-clang

Check history

OK2026-06-09
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-08
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

Documentation signals are not tracked yet for this package.

Downloads

3.3K

CRAN downloads in the past year

Rank #11,541 · ~9/day · ~271/mo

irtQ Releases R versions

Daily download trend is not available in this view yet.

27030 days

90390 days

3.3K1 year

Compare downloads with other packages →

Also on186 r2u17 autocran

Repository

GitHub ↗ hwangq/irtq

0Stars

0Forks

0Open issues

0Open PRs

0Releases

Last activity 2026-06-26

Repository practices

Upstream repositoryBeta

3 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/hwangq/irtq on 2026-07-19.

Continuous integration (1)

GitHub Actions

Docs source (1)

README.Rmd

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

17 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.4

Imports (16)

statsstatmodutilstibble dplyr purrr tidyr rlang reshape2 janitor ggplot2 gridExtraparallelMatrixRfast mirt

LinkingTo (0)

none

Suggests (5)

knitr rmarkdown testthat pkgdown RhpcBLASctl

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

mstATA

Code & Tests

People & History

People (7)

Maintainer (1)

Hwanggyu Lim

Author, Maintainer

Authors (1)

Hwanggyu Lim

Author, Maintainer

Contributors (6)

Jorge González

Contributor

James Howard

Contributor

David Magis

Contributor · added in 0.2.0

Joshua Pritikin

Contributor

Jonathan P Weeks

Contributor

Craig S. Wells

Contributor

Package Timeline

6 releases. R releases are shown for context.

1.1.0Latest
2026-06-07 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
1.0.0
2025-07-17 · diff ↗
R
R 4.5.0 released · 2025-04-11
0.2.1
2024-08-25 · diff ↗
R
R 4.4.0 released · 2024-04-24
0.2.0
2023-07-06 · diff ↗
0.1.1
2023-05-08 · diff ↗
R
R 4.3.0 released · 2023-04-21
0.1.0
2023-01-10
R
R 4.2.0 released · 2022-04-22

Package metadata

First published: 2023-01-10
Total releases: 6 / 3 yrs
License: GPL (>= 2) OSI
Download size: 1.5 MB
Installed size: not tracked yet
With dependencies: not tracked yet

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