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) ...

Knowledge development has been continuously challenging. Qualitative research seems to be promising; however, there are difficulties and complexities involved, one of which is validity. Qualitative ...

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 ...