Package: NPCDTools
Title: The Nonparametric Classification Methods for Cognitive Diagnosis
Version: 1.1.0
Authors@R: c(
          person("Chia-Yi", "Chiu", email = "cc5010@tc.columbia.edu", role = c("aut", "cph")),
          person("Weixuan", "Xiao", email = "wx2299@tc.columbia.edu", role = c("aut", "cre")),
	  person("Hans Friedrich", "Köhn", role = "aut"),
          person("Yu", "Wang", role = "aut"),
          person("Xiran", "Wen",role = "aut")
          )
Description: Statistical tools for analyzing cognitive diagnosis (CD)
        data collected from small settings using the nonparametric
        classification (NPCD) framework. The core methods of the NPCD
        framework includes the nonparametric classification (NPC)
        method developed by Chiu and Douglas (2013)
        <DOI:10.1007/s00357-013-9132-9> and the general NPC (GNPC)
        method developed by Chiu, Sun, and Bian (2018)
        <DOI:10.1007/s11336-017-9595-4> and Chiu and Köhn (2019)
        <DOI:10.1007/s11336-019-09660-x>. An extension of the NPCD
        framework included in the package is the nonparametric method
        for multiple-choice items (MC-NPC) developed by Wang, Chiu, and
        Koehn (2023) <DOI:10.3102/10769986221133088>.  Functions
        associated with various extensions concerning the evaluation,
        validation, and feasibility of the CD analysis are also
        provided. These topics include the completeness of Q-matrix,
        Q-matrix refinement method, as well as Q-matrix estimation.
License: GPL-3
Encoding: UTF-8
RoxygenNote: 7.3.3
Imports: GDINA, psych, stats, utils, gtools, Matrix, shiny
NeedsCompilation: no
Packaged: 2026-07-16 05:16:20 UTC; root
Depends: R (>= 2.10)
LazyData: true
Author: Chia-Yi Chiu [aut, cph], Weixuan Xiao [aut, cre], Hans
        Friedrich Köhn [aut], Yu Wang [aut], Xiran Wen [aut]
Maintainer: Weixuan Xiao <wx2299@tc.columbia.edu>
Config/pak/sysreqs: cmake make libuv1-dev zlib1g-dev
Repository: https://weixuan-xiao.r-universe.dev
Date/Publication: 2026-03-03 20:10:02 UTC
RemoteUrl: https://github.com/cran/NPCDTools
RemoteRef: HEAD
RemoteSha: e699ab4a60b30399795fd6fd1367189de886ee54