Which statement best describes test-retest reliability?

• A. The test yields highly accurate results when administered on the same day
• B. The test yields highly consistent results when administered across different days
• C. The test identifies true positives
• D. The test has high face validity

Answer: (B)

Test-retest reliability is about the stability of scores over time. It means if you administer the same test to the same people on different occasions, the results should be similar if the underlying trait hasn't changed. The strength of this reliability is assessed by looking at the correlation between the two sets of scores; a high correlation indicates that the measure yields consistent results across time.

This resonates with the idea that the test should produce highly consistent results when given across different days, assuming the trait is stable and there isn’t substantial true change or confusing practice effects. The other statements describe different concepts: giving the test on the same day assesses immediate consistency but not stability over time; identifying true positives is about validity/diagnostic accuracy, not reliability; and high face validity concerns how reasonable or believable the test appears, not how consistently it measures over time.