There is a distinction that one learns about on the first day of a course in psychological research methods. It is the difference between internal and external validity. Internal validity is ...

Psychologists have written about different kinds of validity such as criterion validity, predictive validity, concurrent validity, and incremental validity. What I aim to do in this blog post is to ...

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 ...