Depending upon the theoretical basis of the test, a low estimate (e.g., below. 80), this means that the measure has a good test-retest reliability estimate (cf. If the correlation was high (e.g., above. ![]() One might check the reliability of a measure of a trait by administering it to the same group of individuals one week apart and then correlating those scores. Reliability estimates refer to quantitative estimates of a measure’s reliability with a particular sample of individuals who compete the test. The usual definition of reliability refers to a measurement’s ability to produce consistent scores. 2.1 Reliability Definition: The consistency of measurement.ĭescription. While they can be applied to any test, historically their importance results from the field’s emphasis on selection tests. Reliability and validity are typically considered the two most important psychometric properties of tests. This refers to the criteria employed to judge the usefulness of tests for any particular purpose. ![]() When test developers discuss the evaluation of tests and other measurement and assessment devices, they use the term psychometric properties.
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