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To confirm a test’s reliability, assessment companies determine consistency over time with test-retest reliability.

To determine the reliability of their tests, assessment companies pay close attention to two aspects of reliability in particular: re-test reliability and internal consistency measures.įind out why science-based hiring assessments are more helpful at identifying candidates’ potential than resumes, referrals, and interviews here. So, if you’re focusing on the reliability of a test, the question to ask is: are the results of the test consistent? If someone takes the test today, a week from now, and a month from now, will their results be the same? If the results are inconsistent, the test is not considered reliable.

Here’s a good definition of reliability in a research context: if an assessment is reliable, the results will be very similar no matter when someone takes the test. Of the two terms, assessment reliability is the simpler concept to explain and understand.