Which statement best describes content validity?

• A. Whether a measure yields consistent results over time.
• B. Whether a measure is easy to administer.
• C. Whether a measure covers the entire domain it's supposed to evaluate.
• D. Whether a measure has a strong face validity.

Answer: (C)

Content validity asks whether the measure includes items that represent every part of the construct’s domain. A test has good content validity when its items collectively cover all the relevant aspects of what is being measured and don’t omit important facets. To determine this, researchers review the construct, consult experts, and map each item to the domain’s components to ensure comprehensive coverage. This is different from reliability, which is about consistent results over time; from practicality, which is about how easy the measure is to administer; and from face validity, which is only a superficial appearance of measuring what it should be. So the best description is that the measure covers the entire domain it’s supposed to evaluate.