A trustworthy test must be both reliable and valid.

Question

Quizplus · Accepted Answer

A trustworthy test must have both reliable and valid results. Reliability means that the test produces consistent scores over time and across different raters or settings. Validity means that the test actually measures what it is supposed to measure. A test can be reliable but invalid, producing consistent but incorrect results, or it can be valid but unreliable, giving inconsistent scores for the same test-taker or item. Therefore, a reliable test that lacks validity or vice versa cannot be considered trustworthy.

A Trustworthy Test Must Be Both Reliable and Valid