lidity"><i class="fa fa-check"></i><b>5.4</b> Internal validity</a></li>
<li class="chapter" data-level="5.5" data-path="ch-validity.html"><a href="ch-validity.html#sec:constructvalidity"><i class="fa fa-check"></i><b>5.5</b> Construct validity</a></li>
<li class="chapter" data-level="5.6" data-path="ch-validity.html"><a href="ch-validity.html#sec:externalvalidity"><i class="fa fa-check"></i><b>5.6</b> External validity</a></li>
</ul></li>
<li class="chapter" data-level="6" data-path="ch-design.html"><a hre