mbda</dt>
<dd><p>Standard error of \(\lambda_x\) parameters</p></dd>

<dt>pi.k</dt>
<dd><p>Trait distribution</p></dd>

<dt>pjk</dt>
<dd><p>Item response probabilities evaluated for all classes</p></dd>

<dt>n.ik</dt>
<dd><p>An array of expected counts \(n_{cikg}\) of ability class \(c\)
    at item \(i\) at category \(k\) in group \(g\)</p></dd>

<dt>G</dt>
<dd><p>Number of groups</p></dd>

<dt>I</dt>
<dd><p>Number of items</p></dd>

<dt>N</dt>
<dd><p>Number of persons</p></dd>

<dt>delta</dt>
<dd><p>Param