A test of the construct validity of the Health Locus of Control (HLC) scale is presented within the largerframework of Rotter's social learning theory. Self-reported compliance behavior was predicted ...

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 ...

The information needed to determine the internal and external validity of an experimental study is discussed. Internal validity is the degree to which a study establishes the cause-and-effect ...