Validity

Validity or Valid may refer to:

Mathematics and statistics

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
Validity (statistics), the application of the principles of statistics to arrive at valid conclusions
- 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

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.