Measurement is an important part of the scientific process. The key aspects concerning the quality of scientific measures are reliability and validity. Reliability is a measure of the internal ...

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) ...

This includes a powerpoint covering types of validity (Internal, External, Population, Ecological, Temporal), threats to validity (Investigator Bias, DCs, Social desirability, EV’s & CV’s) and ways of ...

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 ...