Which of the following is not a common source of evidence for construct validity?

• A. Test-retest reliability
• B. Content validity
• C. Convergent validity
• D. Discriminant validity

Answer: (A)

Construct validity asks whether a test truly measures the intended construct. To gather evidence for this, researchers examine sources that link the test to the theoretical concept. Content validity asks whether the items cover the full domain of the construct; convergent validity looks for strong relationships with other measures that assess the same or related constructs; discriminant validity shows that the test is not too closely related to measures of different constructs. Test-retest reliability, on the other hand, assesses whether test scores are stable over time. It speaks to consistency, not whether the test captures the intended construct. So it is not a common source of evidence for construct validity.