Package: rasch
Type: Package
Title: Models and Diagnostics for Rasch Measurement Theory
Version: 1.12.0
Authors@R: person("Josh", "McGrane", role = c("aut", "cre"),
    email = "drjoshmcgrane@gmail.com")
Description: Fits models within Rasch Measurement Theory, whose defining
    properties include sufficiency and invariance (Rasch, 1960
    <ISBN:9780226705538>; Andrich and Marais, 2019
    <doi:10.1007/978-981-13-7496-8>). Models include the dichotomous Rasch,
    partial credit, rating scale, explanatory, many-facet and extended frame
    of reference models. Explanatory models include the linear logistic test
    model (Fischer, 1973 <doi:10.1016/0001-6918(73)90003-6>) and linear partial
    credit model (Fischer and Ponocny, 1994 <doi:10.1007/BF02295182>).
    Comparative judgement models, including explanatory object models, are
    available for dichotomous
    (Andrich, 1978 <doi:10.1177/014662167800200319>) and ordered pairwise
    responses (Tutz, 1986 <doi:10.1016/0022-2496(86)90034-9>). Item
    parameters for item-response models are estimated by pairwise conditional
    maximum likelihood (Zwinderman, 1995
    <doi:10.1177/014662169501900406>), comparative judgement parameters by
    maximum likelihood, and person locations by weighted likelihood (Warm,
    1989 <doi:10.1007/BF02294627>). Functions
    cover fit, targeting, reliability, dimensionality, local dependence,
    differential item functioning, equating and simulation. A 'shiny'
    application provides a graphical interface to the analyses.
URL: https://drjoshmcgrane.github.io/rasch/,
        https://github.com/drjoshmcgrane/rasch
BugReports: https://github.com/drjoshmcgrane/rasch/issues
License: MIT + file LICENSE
Encoding: UTF-8
Imports: stats, graphics, grDevices, utils, parallel, Rcpp
LinkingTo: Rcpp
Suggests: testthat (>= 3.0.0), shiny, bslib, DT, bsicons, htmltools,
        xml2, knitr, rmarkdown, eRm, sirt, psychotools, mirt,
        ShinyItemAnalysis, callr, WrightMap
VignetteBuilder: knitr
RoxygenNote: 7.3.3
Config/testthat/edition: 3
NeedsCompilation: yes
Packaged: 2026-08-24 08:02:41 UTC; josh
Author: Josh McGrane [aut, cre]
Maintainer: Josh McGrane <drjoshmcgrane@gmail.com>
Repository: CRAN
Date/Publication: 2026-08-24 08:40:02 UTC
Built: R 4.5.3; x86_64-w64-mingw32; 2026-09-03 00:33:59 UTC; windows
Archs: x64
