Validity in testing describes which concept?

Validity in testing describes which concept?

• A. The degree to which a test measures what it is intended to measure.
• B. The reliability of the test results over repeated trials.
• C. The test's ability to detect true positives.
• D. The test's ability to yield correct results for all patients.

Answer: (A)

Validity asks whether the test actually measures what it is intended to measure. It’s about accuracy in assessing the right construct, not about consistency of results. So the best answer states that the degree to which a test measures what it is intended to measure. Reliability describes consistency across trials and can be present without validity, while the ability to detect true positives relates to diagnostic sensitivity, not overall validity, and no test yields perfect results for everyone. In short, validity focuses on measuring the right thing.

Validity asks whether the test actually measures what it is intended to measure. It’s about accuracy in assessing the right construct, not about consistency of results. So the best answer states that the degree to which a test measures what it is intended to measure. Reliability describes consistency across trials and can be present without validity, while the ability to detect true positives relates to diagnostic sensitivity, not overall validity, and no test yields perfect results for everyone. In short, validity focuses on measuring the right thing.