In everyday language, the term validity is typically used to describe something as being trustworthy or legit. It's meaning in psychology suggests something similar—it's all about whether we can trust ...

Many employers administer pre-employment tests to determine if an applicant meets the minimum qualifications for a position. These tests also predict how an applicant will perform within a given role ...

R is the perfect language for creating a variety of chi-square tests, which are used to perform statistical analyses of counts of data. Here's how, with some sample code. A chi-square test (also ...