 in case of nonlinear item response models.</p></dd>

  <dt>qmcnodes</dt>
<dd><p>Number of integration nodes for quasi Monte Carlo integration (see Pan &amp;
Thompson, 2007; Gonzales et al., 2006). Integration points are obtained by using
the function <code><a href="qmc.nodes.html">qmc.nodes</a></code>. Note that when using quasi Monte Carlo nodes,
no theta design matrix <code>theta.kDES</code> can be specified.
See Example 1, Model 11.</p></dd>

  <dt>mu.fixed</dt>
<dd><p>Matrix with fixed entries in the m