validity
The quality of being logically or factually sound; the extent to which a test or study measures what it claims to measure.
In research, validity is crucial. 'Internal validity' refers to whether the experiment accurately measures cause-and-effect, while 'external validity' refers to whether the results can be generalized to other populations or settings.
Word relationships
- soundness: Soundness refers to being free from error or defect; validity specifically refers to logical or factual soundness in an argument or measurement.
- accuracy: Accuracy refers to correctness or precision; validity refers to whether something measures what it intends to measure, which can be accurate but not valid if it's measuring the wrong thing.
- legitimacy: Legitimacy refers to conformity to law or rules; validity can also refer to this, but in science, it's about methodological rigor.
- invalidity: The state of being unsound or not legally binding.
- fallacy: A mistaken belief, especially one based on unsound argument.
Word family
- valid (adjective): Having a sound basis in logic or fact; legally binding.
- validate (verb): To check or prove the validity or accuracy of something.
Collocations
- internal validity
- external validity
- face validity
- construct validity
- ecological validity
- question the validity
Example sentences
- "The critics questioned the validity of the study's conclusions, pointing out flaws in its experimental design." Ensuring the validity of research findings is paramount.
- "For a contract to have legal validity, all parties must sign it voluntarily and be of sound mind." The validity of a legal document is its legal force.
Memory hook
Think of a 'VALID' (validity) parking ticket that is 'STRONG' and legally sound, meaning it holds up to scrutiny. VALID-ITY: Soundness, strength.
When not to use
Do not use 'validity' to mean 'truth' in a general sense. It specifically refers to the soundness of an argument, measurement, or conclusion based on its internal logic or how well it reflects reality.
Fun facts
- In logic, an argument is 'valid' if its conclusion necessarily follows from its premises, regardless of whether the premises themselves are true.
Related words
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