a></li>
<li class="chapter" data-level="4.3" data-path="research.html"><a href="research.html#internal-and-external-validity"><i class="fa fa-check"></i><b>4.3</b> Internal and External Validity</a></li>
<li class="chapter" data-level="4.4" data-path="research.html"><a href="research.html#research-methods"><i class="fa fa-check"></i><b>4.4</b> Research Methods</a></li>
<li class="chapter" data-level="4.5" data-path="research.html"><a href="research.html#research-designs"><i class="fa fa-check"></i><b>4.5</b