In your unit studies, you read about two approaches or models of validity—trinitarian and unitary. In some ways, these two models are competing views of gathering evidence for a test’s validity. In other ways, the two approaches have an overlap of elements.
For this discussion:
Be sure to include citations from Guion’s 1980 article, “On Trinitarian Doctrines of Validity,” and Messick’s 1995 article, “Validity of Psychological Assessment: Validation of Inferences From Persons’ Responses and Performances As Scientific Inquiry Into Score Meaning.”
Respond to the posts of at least two other learners.