Package: difR
Type: Package
Title: Collection of Methods to Detect Dichotomous and Polytomous
        Differential Item Functioning (DIF)
Version: 6.0.0
Date: 2025-05-24
Authors@R: c(person("David", "Magis", role = c("aut"), comment = "IQVIA Belux"), person("Sebastien", "Beland", email = "sebastien.beland@umontreal.ca", role = c("aut", "cre"), comment = "Universite de Montreal"), person("Carl F.", "Falk", role = "aut", comment = "McGill University"), person("Gilles", "Raiche", role = "aut", comment = "UQAM"))
Maintainer: Sebastien Beland <sebastien.beland@umontreal.ca>
Depends: R (>= 3.0.0)
Imports: mirt, ltm, lme4, deltaPlotR, DescTools, VGAM, glmnet
Description: Methods to detect differential item functioning (DIF) in
        dichotomous and polytomous items, using both classical and
        modern approaches. These include Mantel-Haenszel procedures,
        logistic regression (including ordinal models), and
        regularization-based methods such as LASSO. Uniform and
        non-uniform DIF effects can be detected, and some methods
        support multiple focal groups. The package also provides tools
        for anchor purification, rest score matching, effect size
        estimation, and DIF simulation. See Magis, Beland, Tuerlinckx,
        and De Boeck (2010, Behavior Research Methods, 42, 847–862,
        <doi:10.3758/BRM.42.3.847>) for a general overview.
License: GPL (>= 2)
Encoding: UTF-8
LazyData: true
RoxygenNote: 7.3.2
URL: https://github.com/343Babou/difR
BugReports: https://github.com/343Babou/difR/issues
Config/pak/sysreqs: cmake make libuv1-dev libssl-dev libx11-dev
        zlib1g-dev
Repository: https://343babou.r-universe.dev
Date/Publication: 2025-05-26 09:36:33 UTC
RemoteUrl: https://github.com/343babou/difr
RemoteRef: HEAD
RemoteSha: a50aefa3ed396913b2909522b1cdd51b77754a03
NeedsCompilation: no
Packaged: 2026-10-15 11:29:59 UTC; root
Author: David Magis [aut] (IQVIA Belux),
  Sebastien Beland [aut, cre] (Universite de Montreal),
  Carl F. Falk [aut] (McGill University),
  Gilles Raiche [aut] (UQAM)
