Reliability is measured by which statement?

• A. They yield inconsistent results across administrations
• B. They yield similar results across time and forms
• C. They measure validity
• D. They predict future performance

Answer: (B)

Reliability means the scores are stable and consistent. When a test is reliable, administering it to the same person on different occasions should yield similar results (test-retest), and using equivalent forms should also produce similar scores (parallel forms). That focus on consistency across time and across forms is exactly what reliability measures. Validity, on the other hand, asks whether the test measures what it’s supposed to measure, and predictive validity concerns predicting future performance. So the statement about yielding similar results across time and forms best reflects reliability.