Validity Definitions Extent to which a test measures what it purports to measure Extent to which a test is used in an impartial, just, and equitable way Validity is what the test measures and how well it does so (Anastasi, 1954)
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What are Constructs?
Why are they important?
Positive relationship to ‘in loveness scale’
Positive relationship to ‘probability of marrying coefficient’
Positive relationship to ‘never felt this before coefficient’
Positive relationship with ‘gazing adoringly’
Positive but different relationship to self reported ‘friendness coefficient’ (i.e. like, not love)
Negative relationship to ‘hate coefficient’
Negative relationship to ‘social desirability scale’
Positive relationship to ‘glancing’Example: Love (think evidence)
Keith Herman (2004)
Validity of Inferences
inside the test
relationship to other tests
when we talk about validity we are addressing reasons why we might not trust inferences