p>an online survey system, to assess demographics and pre/post study depression severity (with the PHQ-9 questionnaire, <span class="citation">Kroenke et al. (<a href="#ref-Kroenke2009">2009</a>)</span>),</p></li>
<li><p>an active EMA smartphone app, to assess day-to-day changes in mood, and</p></li>
<li><p>an accelerometer to assess activity levels.</p></li>
</ol>
<div class="figure" style="text-align: center"><span id="fig:dm-project-tree"></span>
<img src="images/datamanagement/project_tree.png" alt="Exa