1. What is the difference between the reliability and validity of a measurement? The validity of a measure is the extent to which differences in scores on the instrument reflect true differences among ...

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 ...

Lissitz and Samuelsen (2007) have proposed a framework that seemingly deems construct validity evidence irrelevant to supporting educational test meaning. The author of this article agrees with ...

Free-response and machine-scorable versions of a test called Formulating Hypotheses were compared with respect to construct validity. For both forms, scores reflecting quality of hypotheses were ...