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.
Downloads
10.2K
Last 30 days
1161st
35.1K
Last 90 days
132.1K
Last year
Trend: -22.5% (30d vs prior 30d)
83
Last 30 days
364
Last 90 days
1K
Last year
Trend: -27.8% (30d vs prior 30d)
9
Last 7 days
19
Last 30 days
4
All-time
autoCRAN-only: this name is served only by autoCRAN, so the count is exact.
291
Last 30 days
1.1K
Last 90 days
8.4K
Last year
Trend: -48.8% (30d vs prior 30d)
CRAN Check Status
Show all 13 flavors
| Flavor | Status |
|---|---|
| r-devel-linux-x86_64-debian-clang | OK |
| r-devel-linux-x86_64-debian-gcc | OK |
| r-devel-linux-x86_64-fedora-clang | OK |
| r-devel-linux-x86_64-fedora-gcc | OK |
| r-devel-windows-x86_64 | OK |
| r-oldrel-macos-arm64 | OK |
| r-oldrel-macos-x86_64 | OK |
| r-oldrel-windows-x86_64 | OK |
| r-patched-linux-x86_64 | OK |
| r-release-linux-x86_64 | OK |
| r-release-macos-arm64 | OK |
| r-release-macos-x86_64 | OK |
| r-release-windows-x86_64 | OK |
Check History
OK 13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE May 2, 2026
ERROR 11 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE Apr 25, 2026
whether package can be installed
Installation failed. See ‘/Volumes/Builds/packages/big-sur-x86_64/results/4.6/mirt.Rcheck/00install.out’ for details.
NOTE 12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Apr 22, 2026
installed package size
installed size is 10.2Mb
sub-directories of 1Mb or more:
R 2.0Mb
libs 7.5Mb
installed package size
installed size is 9.4Mb
sub-directories of 1Mb or more:
R 2.0Mb
libs 6.6Mb
ERROR 11 OK · 2 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE Apr 18, 2026
whether package can be installed
Installation failed. See 'd:/Rcompile/CRANpkg/local/4.6/mirt.Rcheck/00install.out' for details.
installed package size
installed size is 10.2Mb
sub-directories of 1Mb or more:
R 2.0Mb
libs 7.5Mb
installed package size
installed size is 9.4Mb
sub-directories of 1Mb or more:
R 2.0Mb
libs 6.6Mb
NOTE 12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026
installed package size
installed size is 10.2Mb
sub-directories of 1Mb or more:
R 2.0Mb
libs 7.5Mb
installed package size
installed size is 9.4Mb
sub-directories of 1Mb or more:
R 2.0Mb
libs 6.7Mb
Code
Structure
Lines of code
54,071
Files
245
Compiled share
10.5%
Has compiled src
Yes
Language breakdown
API
Exported functions
65
Internal functions
230
Recent export changes
Testing & CI
Has tests
Yes
Test-to-code ratio
0.07
testthat edition
3
CI present
No
CI type
[]
PR gated
No
Docs
Return-value doc rate
33.8%
\dontrun example ratio
73.5%
Roxygen coverage
100%
Has pkgdown
No
NEWS present
Yes
Health & Security signals
Informational signals; not verdicts.
on.exit coverage
–
Unsafe pattern score
0
Dep constraint coverage
12.5%
Secret pattern count
0
Bundled 3rd-party code
2 items
Portability & License
Min R version
4.1.0
System requirements
–
C++ standard
–
License
GPL (>= 3)
License flags
SPDX valid, OSI approved
History
Versions
82
First release
2011-07-02
Latest release
2026-03-07
Avg cadence
57 days
Cold removal rate
100%
Dep drift
42
LOC over versions
Per-file churn detail lives in the source pipeline: https://github.com/r-observatory/cran-code-metrics.