Criterion Validity 2
Criterion Validity 2 : The extent to which the measurement correlates with an external criterion of the phenomenon under study. Two aspects of criterion validity can be distinguished. (1) Concurrent validity. The measurement and the criterion refer to the same point in time. An example would be a visual inspection of a wound for evidence of infection validated against bacteriological examination of a specimen taken at the same time. (2) Predictive validity. The measurement's validity is expressed in terms of its ability to predict the criterion. An example would be an academic aptitude test that was validated against subsequent academic performance
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