Evidence based on Relations to Other Variables

Traditionally: convergent validity, discriminant validity, predictive validity, concurrent validity, criterion validity, external validity​.

How does your score relate to others? How should it be? What groups should perform differently than others? 

Convergent/Discriminant evidence: What is the agreement between your test and another that should or should not be related?​

Test-criterion relationships: How well do test scores predict some criteria?​

Generalization: How well can evidence be generalized to other settings?​

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