Those of us in the business of psychological measurement use the terms reliability and validity a lot. You've probably seen those terms on the Psychology Today website (they appear thousands of times) ...

BCVA can remain deceptively stable until late RP and becomes insensitive at profound vision loss, motivating performance-based endpoints that map to mobility and object recognition. Enrollment ...

In my previous blog post, I noted that reliability and validity are two essential properties of psychological measurement. Measures of intelligence, personality, vocational interests, and so forth ...