Package: irtQ
Type: Package
Title: Unidimensional Item Response Theory Modeling
Version: 0.2.1
Description: 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>).
Depends: R (>= 4.1)
License: GPL (>= 2)
Encoding: UTF-8
LazyData: true
Imports: stats, statmod, utils, tibble, dplyr, purrr, tidyr, rlang,
        reshape2, janitor, ggplot2, gridExtra, parallel, Matrix, Rfast,
        mirt
Authors@R: c(person("Hwanggyu", "Lim", email="hglim83@gmail.com", role=c("aut", "cre")), 
    person("Craig S.", "Wells", email="cswells@educ.umass.edu ", role="ctb"), 
    person("James", "Howard", email="jh@jameshoward.us", role="ctb"),
    person("Joshua", "Pritikin", email="jpritikin@pobox.com", role="ctb"), 
    person("Jonathan P", "Weeks", email="weeksjp@gmail.com", role="ctb"), 
    person("Jorge", "González", email="jgonzale@mat.puc.cl", role="ctb"), 
    person("David", "Magis", email="david.magis@uliege.be", role="ctb") 
    ) 
RoxygenNote: 7.3.2
NeedsCompilation: no
Packaged: 2024-08-25 02:50:06 UTC; kijja
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@gmail.com>
Repository: CRAN
Date/Publication: 2024-08-25 03:50:02 UTC
Built: R 4.3.3; ; 2025-04-07 03:45:41 UTC; windows
