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<!DOCTYPE html>
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<title>Cognitive Diagnosis Modeling • CDM</title>
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<script src="pkgdown.js"></script><meta property="og:title" content="Cognitive Diagnosis Modeling">
<meta property="og:description" content="
Functions for cognitive diagnosis modeling and multidimensional item response modeling
for dichotomous and polytomous item responses. This package enables the estimation of
the DINA and DINO model (Junker & Sijtsma, 2001, <doi:10.1177/01466210122032064>),
the multiple group (polytomous) GDINA model (de la Torre, 2011,
<doi:10.1007/s11336-011-9207-7>), the multiple choice DINA model (de la Torre, 2009,
<doi:10.1177/0146621608320523>), the general diagnostic model (GDM; von Davier, 2008,
<doi:10.1348/000711007X193957>), the structured latent class model (SLCA; Formann, 1992,
<doi:10.1080/01621459.1992.10475229>) and regularized latent class analysis
(Chen, Li, Liu, & Ying, 2017, <doi:10.1007/s11336-016-9545-6>).
See George, Robitzsch, Kiefer, Gross, and Uenlue (2017) <doi:10.18637/jss.v074.i02>
or Robitzsch and George (2019, <doi:10.1007/978-3-030-05584-4_26>)
for further details on estimation and the package structure.
For tutorials on how to use the CDM package see
George and Robitzsch (2015, <doi:10.20982/tqmp.11.3.p189>) as well as
Ravand and Robitzsch (2015).">
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<span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="">8.3-7</span>
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<div class="page-header"><h1 id="cdm">CDM<a class="anchor" aria-label="anchor" href="#cdm"></a>
</h1></div>
<div class="section level4">
<h4 id="cognitive-diagnosis-modeling">Cognitive Diagnosis Modeling<a class="anchor" aria-label="anchor" href="#cognitive-diagnosis-modeling"></a>
</h4>
<p>If you use <code>CDM</code> and have suggestions for improvement or have found bugs, please email me at <a href="mailto:[email protected]" class="email">[email protected]</a>. Please always provide a minimal dataset, necessary to demonstrate the problem, a minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and all necessary information on the used librarys, the R version, and the OS it is run on, perhaps a sessionInfo().</p>
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<h4 id="manual">Manual<a class="anchor" aria-label="anchor" href="#manual"></a>
</h4>
<p>The manual can be found here <a href="https://alexanderrobitzsch.github.io/CDM/" class="external-link">https://alexanderrobitzsch.github.io/CDM/</a></p>
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<div class="section level4">
<h4 id="cran-version">CRAN version<a class="anchor" aria-label="anchor" href="#cran-version"></a>
</h4>
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<p>The official version of <code>CDM</code> is hosted on CRAN and can be found <a href="https://cran.r-project.org/package=CDM" class="external-link">here</a>. The CRAN version can be installed from within R using:</p>
<div class="sourceCode" id="cb1"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="fu">utils</span><span class="fu">::</span><span class="fu"><a href="https://rdrr.io/r/utils/install.packages.html" class="external-link">install.packages</a></span><span class="op">(</span><span class="st">"CDM"</span><span class="op">)</span></span></code></pre></div>
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<h4 id="github-version">GitHub version<a class="anchor" aria-label="anchor" href="#github-version"></a>
</h4>
<p>The version hosted <a href="https://github.com/alexanderrobitzsch/CDM" class="external-link">here</a> is the development version of <code>CDM</code>. The GitHub version can be installed using <code>devtools</code> as:</p>
<div class="sourceCode" id="cb2"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="fu">devtools</span><span class="fu">::</span><span class="fu"><a href="https://remotes.r-lib.org/reference/install_github.html" class="external-link">install_github</a></span><span class="op">(</span><span class="st">"alexanderrobitzsch/CDM"</span><span class="op">)</span></span></code></pre></div>
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<h2 data-toc-skip>Links</h2>
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<li><a href="https://cloud.r-project.org/package=CDM" class="external-link">View on CRAN</a></li>
<li><a href="https://github.com/alexanderrobitzsch/CDM/" class="external-link">Browse source code</a></li>
<li><a href="https://github.com/alexanderrobitzsch/CDM/issues?state=open" class="external-link">Report a bug</a></li>
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<div class="license">
<h2 data-toc-skip>License</h2>
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<li>GPL (>= 2)</li>
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<div class="citation">
<h2 data-toc-skip>Citation</h2>
<ul class="list-unstyled">
<li><a href="authors.html#citation">Citing CDM</a></li>
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<div class="developers">
<h2 data-toc-skip>Developers</h2>
<ul class="list-unstyled">
<li>Alexander Robitzsch <br><small class="roles"> Maintainer </small> </li>
</ul>
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<p>Developed by Alexander Robitzsch.</p>
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<p>Site built with <a href="https://pkgdown.r-lib.org/" class="external-link">pkgdown</a> 2.0.7.</p>
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