What does discriminative validity measure in a test?

• A. The reliability of repeated tests.
• B. The ability to differentiate between various disorders.
• C. The generalizability of test results.
• D. The overall effectiveness of treatment outcomes.

Answer: (B)

Discriminative validity specifically measures a test's ability to differentiate between different disorders or conditions. This is crucial in clinical settings where it's necessary to identify distinct diagnoses based on symptoms or clinical presentations. For example, a test that can accurately distinguish between various types of musculoskeletal conditions and their respective characteristics demonstrates strong discriminative validity.

This capability is essential for effective diagnosis, treatment planning, and intervention strategies in orthopedic practice, as it informs healthcare providers about specific conditions that may require different management approaches. By confirming that a test can differentiate between conditions, clinicians can make more informed decisions and lead to better patient outcomes.