verse.org/reference/labs.html" class="external-link">labs</a></span><span class="op">(</span>title<span class="op">=</span><span class="st">"Test Information Curve"</span><span class="op">)</span><span class="op">+</span><span class="fu"><a href="https://ggplot2.tidyverse.org/reference/geom_ribbon.html" class="external-link">geom_area</a></span><span class="op">(</span>fill<span class="op">=</span><span class="st">"blue"</span>, alpha<span class="op">=</span><span class="fl">.5</span><span class="op">)</spa