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 ...

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 ...

IQ tests are one of the most prominent tools in the modern psychologist's toolbox. They also have numerous methodological flaws. IQ, short for intelligence quotient, is one of the most widely cited ...

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 ...

Background: We established a program of research to improve the development, reporting and evaluation of practice guidelines. We assessed the construct validity of the items and user’s manual in the β ...