In order to use the known groups paradigm to establish criterion validity, which of the following is necessary?
A)At least three groups must be used.
B)After testing, the groups should have significantly different scores on the measure.
C)Prior to testing, similarity between the groups must be demonstrated.
D)The groups must be composed of experts in the field of psychology.

Question

Quizplus · Accepted Answer

The known groups paradigm involves testing pre-existing groups that are known to differ on the construct being measured. For criterion validity to be established, the groups must have significantly different scores on the measure, indicating that the measure can distinguish between them. While it is possible to use more than three groups, it is not a necessity. Prior similarity between the groups may be a consideration, but it is not a requirement. The groups do not need to be composed of experts in the field of psychology, as long as they are different on the construct being measured.

In Order to Use the Known Groups Paradigm to Establish