In
social science and
psychometrics, construct validity refers to whether a
scale measures the unobservable
social construct (such as "fluid intelligence") that it purports to measure. It is related to the theoretical ideas behind the
personality trait under consideration; a non-existent concept in the physical sense may be suggested as a method of organising how personality can be viewed. The unobservable idea of a unidimensional easier-to-harder dimension must be "constructed" in the words of human language and graphics.
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one of the forms of
validity for an
operational definition . If a test has "construct validity" then it measures what it says it measures, or rather there is evidence that it measures what it says it measures. There are various standard ways of trying to establish that a test has "construct validity." One standard way is triangulation. If another test that is supposed to measure the same thing gives the same results as the test being studied, then this is used as evidence for construct validity in the test being studied. Obviously, however, if the first test was itself invalid, then its correspondence with the test being studied would not be a good test. No test for construct validity is without similar inherent problems. (See
face validity .)
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