an><span class="va">Q</span>, irtmodel<span class="op">=</span><span class="st">"comp"</span>, est.b<span class="op">=</span><span class="va">itemnr</span>, mu.fixed<span class="op">=</span><span class="va">mu.fixed</span> <span class="op">)</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/base/summary.html" class="external-link">summary</a></span><span class="op">(</span><span class="va">mod1</span><span class="op">)</span></span>
<span></span>
<span><span class="co">########################