# Validity

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> Source: https://en.wikipedia.org/wiki/Validity
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{{Wiktionary|validity|valid}}

'''Validity''' or '''Valid''' may refer to:
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==Mathematics==
* [Validity (logic)](/source/Validity_(logic)), a property of a logical argument

==Statistics==
* [Validity (statistics)](/source/Validity_(statistics)), the degree to which a statistical tool measures that which it is purported to measure 
** [Statistical conclusion validity](/source/Statistical_conclusion_validity), establishes the existence and strength of the co-variation between the cause and effect variables
** [Test validity](/source/Test_validity), validity in educational and psychological testing
** [Face validity](/source/Face_validity), the property of a test intended to measure something 
** [Construct validity](/source/Construct_validity), refers to whether a scale measures or correlates with the theorized psychological construct it measures
** [Content validity](/source/Content_validity), the extent to which a measure represents all facets of a given construct
** [Concurrent validity](/source/Concurrent_validity), the extent to which a test correlates with another measure
** [Predictive validity](/source/Predictive_validity), the extent to which a score on a scale or test predicts scores on some other measure
** [Discriminant validity](/source/Discriminant_validity), the degree to which results a test of one concept can be expected to differ from tests of other concepts that should not be correlated with this one
** [Criterion validity](/source/Criterion_validity),  the extent to which a measure is related to an outcome
** [Convergent validity](/source/Convergent_validity), the degree to which multiple measures of the same construct lead to the same conclusion

==Science==
* [Internal validity](/source/Internal_validity), the validity of causal inferences within scientific studies, usually based on experiments
* [External validity](/source/External_validity), the validity of generalized causal inferences in scientific studies, usually based on experiments
* [Valid name (zoology)](/source/Valid_name_(zoology)), in animal taxonomy
* [Validly published name](/source/Validly_published_name), in plant taxonomy

==Other uses==

* [Valid (number format)](/source/Valid_(number_format)), a universal number format (unum type III) 
* [Valid (engraving company)](/source/Valid_(engraving_company)), a Brazilian company
* [VALID (Video Audio Line-up & IDentification)](/source/GLITS), part of the '''GLITS''' broadcast television protocol
*[Validity and liceity (Catholic Church)](/source/Validity_and_liceity_(Catholic_Church)), concepts in the Catholic Church.

==See also==
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*[Validation (disambiguation)](/source/Validation_(disambiguation))

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Adapted from the Wikipedia article [Validity](https://en.wikipedia.org/wiki/Validity) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Validity?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.