Which statement best expresses the relationship between a test's reliability is and its validity.
A)Reliability is a necessary condition for a test's validity.
B)Reliability is a sufficient condition for a test's validity.
C)Reliability is a sufficient, but not necessary, condition for a test's validity.
D)Reliability is both sufficient and necessary for a test's validity.

Question

Quizplus · Accepted Answer

Reliability refers to the consistency of a test's results, while validity refers to the accuracy of what the test is supposed to measure. A test must be reliable to be valid, because if it does not consistently measure what it is supposed to, it cannot accurately measure it. However, a test can be reliable without being valid, meaning it consistently measures something, but not necessarily what it is intended to measure. Therefore, reliability is a necessary condition for validity, but not a sufficient one.

Which Statement Best Expresses the Relationship Between a Test's Reliability