Which statement best describes reliability in a pre-employment test?

• A. The test measures overall job performance.
• B. The test produces results that vary wildly.
• C. The test measures the job tasks in the actual environment.
• D. The test produces consistent results over time.

Answer: (D)

Reliability in pre-employment testing refers to how consistently a measurement behaves under similar conditions. When a test is reliable, administering it again or having the same scoring criteria produce similar results over time. The best description here is that the test produces consistent results over time, because stability of scores indicates that random error is minimal and the measurement is dependable. The other ideas point to validity rather than reliability: measuring overall job performance speaks to whether the test predicts performance, not whether the scores are consistent; a test whose results vary wildly shows poor reliability; and measuring job tasks in the actual environment describes real-world or ecological validity, not the consistency of the test’s measurements. For a concrete feel, if you give the same test to the same person on different occasions and their scores stay roughly the same, that demonstrates reliability.