"Specifically, they want to focus more on testing validity, which for quantitative social scientists refers to how well a given questionnaire measures what it’s claiming to measure—and, more fundamentally, whether what it is measuring has a coherent definition."<p>Ref.:<p><a href="https://news.ycombinator.com/item?id=43933962">https://news.ycombinator.com/item?id=43933962</a><p><a href="https://news.ycombinator.com/item?id=43927550">https://news.ycombinator.com/item?id=43927550</a>