Reliability is best defined as
A) the extent to which a test measures what it says it measures.
B) the degree to which a test produces the same scores over and over again.
C) the extent to which the same procedures are used every time the same test is administered and scored.
D) the degree to which a large population is tested on a test to determine what 'average' performance is.

Question

Quizplus · Accepted Answer

Reliability refers to the consistency or stability of test scores over repeated administrations or by different administrators. Option B refers to the degree to which a test produces the same scores over and over again, making it the best choice for defining reliability. Option A defines validity, option C defines standardization, and option D describes norming.

Reliability Is Best Defined as