Validity (statistics), the degree to which a statistical tool measures that which it is purported to measure
Statistical conclusion validity, establishes the existence and strength of the co-variation between the cause and effect variables
Test validity, validity in educational and psychological testing
Face validity, the property of a test intended to measure something
Construct validity, refers to whether a scale measures or correlates with the theorized psychological construct it measures
Content validity, the extent to which a measure represents all facets of a given construct
Concurrent validity, the extent to which a test correlates with another measure
Predictive validity, the extent to which a score on a scale or test predicts scores on some other measure
Discriminant validity, the degree to which results a test of one concept can be expected to differ from tests of other concepts that should not be correlated with this one
Criterion validity, the extent to which a measure is related to an outcome
Convergent validity, the degree to which multiple measures of the same construct lead to the same conclusion
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