tory 2PL model</span></span>
<span><span class="va">mod2</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>, est.a<span class="op">=</span><span class="st">"2PL"</span>, maxiter<span class="op">=</span><span class="fl">15</span> <span class="op">)</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/base/summary.html" c