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Predictive validity is a logical inference from which results of a measure or test share comparable results with an alternative measure or test taken at a different time. The type of validity testing belongs to the category of criterion validity, which establishes, more or less accurately, predictability of an outcome of some other past or future measure or test. The extent to which results derived from the measure in question correspond with results from the alternative test, taken at a different time, is the extent to which predictive validity may be argued. The higher the degree of similarity in function (e.g., high correlation) between the two tests—the one in question and the alternative—the more predictive validity becomes established. Predictive validity, therefore, is the related accuracy ...

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