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 ...

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 debate over a link between autism and vaccines continues. A study published earlier this month concluded African-American boys are more at risk for autism if they’re given the measles, mumps and ...

From the perspective of score interpretation, the purpose of testing accommodations is to reduce the dependence of test scores on factors that are irrelevant to the construct that is being assessed.