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What is Reliability?

What is Reliability?

Psychometrics

What is Reliability?

Reliability is the desired consistency (or reproducibility) of test scores. In practical terms reliability is the degree to which individual’ deviation scores, or z-scores, remain relatively consistent over repeated administration of the same test or alternate test forms (Crocker and Algina, 1986, p. 105).  Test developers must demonstrate that the scores obtained are reliable otherwise […]

arnold on Sep 17, 2008