va">I</span><span class="op">)</span></span>
<span></span>
<span><span class="co">#***</span></span>
<span><span class="co"># Model 1: Noncompensatory 1PL model</span></span>
<span><span class="va">mod1</span> <span class="op">&lt;-</span> <span class="fu">sirt</span><span class="fu">::</span><span class="fu">smirt</span><span class="op">(</span><span class="va">dat</span>, Qmatrix<span class="op">=</span><span class="va">Q</span>, maxiter<span class="op">=</span><span class="fl">10</span> <span class="op">