class="fl">20</span><span class="op">)</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/base/summary.html" class="external-link">summary</a></span><span class="op">(</span><span class="va">mod3</span><span class="op">)</span></span>
<span></span>
<span><span class="co">#***</span></span>
<span><span class="co"># Model 4: Bifactor model with one general factor (g) and</span></span>
<span><span class="co">#          uncorrelated specific factors</span></span>
<span></span>
<span><span class="co