Definition
A property of a test or assessment indicating that performance on it accurately predicts performance on the real-world task it is meant to measure. In aviation training, a criterion-valid test is one where success on the test corresponds to the ability to actually perform the skill in the aircraft or operational environment.
Plain English
It means the test really does measure what it is supposed to measure. If a student passes a criterion-valid test, you can trust that they can actually do the thing in real life — not just answer questions about it.
Context Anchor
Seen in aviation instructor material when discussing whether training, quizzes, stage checks, and practical test preparation match the standards used for pilot certification.
Derivation
From Greek 'kriterion' meaning a standard for judging, combined with 'valid' from Latin 'validus' meaning strong or sound. Together: a test is sound because it is judged against a real-world standard of performance.
Why Pilots Care
It guarantees that meeting the standard demonstrates the ability to perform safely in the aircraft, supporting consistent and meaningful certification decisions.
Intuition Check
Valid does not just mean official, approved, or generally good here. Criterion valid means matched to a specific standard used for judging.
Example Sentence 1
The ACS is designed to be criterion valid, so the tasks on the practical test reflect what a pilot must actually do in flight.
Example Sentence 2
Because the checkride is criterion valid, an instructor knows precisely what level of performance meets the requirement for certification.