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Fit unidimensional item response theory (IRT) models to a mixture of dichotomous and polytomous data, calibrate online item parameters (i.e., pretest and operational items), 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>).
| Version: | 0.2.1 |
| Depends: | R (≥ 4.1) |
| Imports: | stats, statmod, utils, tibble, dplyr, purrr, tidyr, rlang, reshape2, janitor, ggplot2, gridExtra, parallel, Matrix, Rfast, mirt |
| Published: | 2024-08-25 |
| DOI: | 10.32614/CRAN.package.irtQ |
| Author: | Hwanggyu Lim [aut, cre], Craig S. Wells [ctb], James Howard [ctb], Joshua Pritikin [ctb], Jonathan P Weeks [ctb], Jorge González [ctb], David Magis [ctb] |
| Maintainer: | Hwanggyu Lim <hglim83 at gmail.com> |
| License: | GPL-2 | GPL-3 [expanded from: GPL (≥ 2)] |
| NeedsCompilation: | no |
| Materials: | README NEWS |
| CRAN checks: | irtQ results |
| Reference manual: | irtQ.pdf |
| Package source: | irtQ_0.2.1.tar.gz |
| Windows binaries: | r-devel: irtQ_0.2.1.zip, r-release: irtQ_0.2.1.zip, r-oldrel: irtQ_0.2.1.zip |
| macOS binaries: | r-release (arm64): irtQ_0.2.1.tgz, r-oldrel (arm64): irtQ_0.2.1.tgz, r-release (x86_64): irtQ_0.2.1.tgz, r-oldrel (x86_64): irtQ_0.2.1.tgz |
| Old sources: | irtQ archive |
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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.