pan><span class="fl">1</span>, <span class="st">"b"</span><span class="op">=</span><span class="fl">0</span> <span class="op">)</span></span>
<span><span class="co"># define some slightly informative prior of 2PL</span></span>
<span><span class="va">item_2PL</span> <span class="op">&lt;-</span> <span class="fu">sirt</span><span class="fu">::</span><span class="fu">xxirt_createDiscItem</span><span class="op">(</span> name<span class="op">=</span><span class="st">"2PL"</span>, par<span class="op">=</span><spa