Concurrent validity is defined as the degree of correlation between two measures of the same concept that are administered when?

• A. At Different Times
• B. On Different Populations
• C. In Retrospective Fashion
• D. At the Same Time

Answer: (D)

Concurrent validity examines how well a new measure aligns with an established measure of the same construct when both are given in the same moment. Administering both tests at the same time keeps the construct stable, so the observed correlation truly reflects how closely the two measures capture the same attribute rather than changes in the person over time. If the assessments were given at different times, factors like fatigue, pain, learning, or progression could affect scores and distort the relationship. For example, a new balance test would be validated by administering it alongside a proven balance test in the same session to see if they produce similar results. This differs from predictive validity, which looks at how well a test forecast outcomes in the future.