 it should be <em>valid</em>.</p>
<div id="reliability" class="section level3 hasAnchor" number="2.3.1">
<h3><span class="header-section-number">2.3.1</span> Reliability<a href="working-with-data.html#reliability" class="anchor-section" aria-label="Anchor link to header"></a></h3>
<p>Reliability refers to the consistency of our measurements. One common form of reliability, known as “test-retest reliability”, measures how well the measurements agree if the same measurement is performed twice. For example