Interdependency of construct, face, and predictive validity. Construct, face, and predictive validity are highly interdependent. Depending on the available information, a model system can be built ...

Assessing the presence and degree of synovitis is the cornerstone of managing patients with arthritis. Ultrasound has been ...

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 ...

There is a distinction that one learns about on the first day of a course in psychological research methods. It is the difference between internal and external validity. Internal validity is ...