Dictionary of British Education
An intelligence test or examination rarely measures exactly what it is intended to measure.
For example, a test of creativity might give results that are superficially plausible but which, on further investigation, turn out to be no more than a test of intelligence. The validity of many tests of attitude is often called into question: asking students to say what they would do may not be a valid measure of what they would actually do in real life. (See also reliability)
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