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Validity or Valid may refer to:

• Validity (logic), a property of a logical argument

• Validity (statistics), the degree to which a statistical tool measures that which it is purported to measure
  • Statistical conclusion validity, establishes the existence and strength of the co-variation between the cause and effect variables
  • Test validity, validity in educational and psychological testing
  • Face validity, the property of a test intended to measure something
  • Construct validity, refers to whether a scale measures or correlates with the theorized psychological construct it measures
  • Content validity, the extent to which a measure represents all facets of a given construct
  • Concurrent validity, the extent to which a test correlates with another measure
  • Predictive validity, the extent to which a score on a scale or test predicts scores on some other measure
  • 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, the extent to which a measure is related to an outcome
  • Convergent validity, the degree to which multiple measures of the same construct lead to the same conclusion

• Internal validity, the validity of causal inferences within scientific studies, usually based on experiments
• External validity, the validity of generalized causal inferences in scientific studies, usually based on experiments
• Valid name (zoology), in animal taxonomy
• Validly published name, in plant taxonomy

• Valid (number format), a universal number format (unum type III)
• Valid (engraving company), a Brazilian company
• VALID (Video Audio Line-up & IDentification), part of the GLITS broadcast television protocol
• Validity and liceity (Catholic Church), concepts in the Catholic Church.

• All pages with titles containing Validity
• Validation (disambiguation)

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