Content validity is a test which is a representative sample of performance in some defined area of job-related knowledge, skill, ability , or other characteristic.
The extent to which a test adequately samples the domain of information, knowledge, or skill that it purports to measure. Determined primarily by "Expert judgment". Most important for achievement and job sample tests
Other /More definition:
Content validity refers to the extent to which a measure assesses all the important aspects of a phenomenon that it purports to measure
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Predictive validity is the xtent to which a measure accurately forecasts how a person will think, act, . . . Read More | |