><span class="va">res</span><span class="op">$</span><span class="va">mirt</span><span class="op">)</span></span>
<span></span>
<span><span class="co">#******************</span></span>
<span><span class="co">#*** Model 5: 3-dimensional model with some parameter constraints and</span></span>
<span><span class="co">#             parameter fixings</span></span>
<span><span class="va">lavmodel</span> <span class="op">&lt;-</span> <span class="st">"</span></span>
<span><span class="st">     A=~ a*A1+a*A2+1.3*A3+