f="https://rdrr.io/r/base/summary.html" class="external-link">summary</a></span><span class="op">(</span><span class="va">mod9</span><span class="op">)</span></span>
<span></span>
<span><span class="co">#***</span></span>
<span><span class="co"># Model 10: Two-dimensional item response model with latent interaction</span></span>
<span><span class="co">#           between dimensions</span></span>
<span><span class="va">theta.k</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/b