Assessment terms beginning with T

This is a measurement glossary, not a general HR glossary. It covers the vocabulary that appears the moment you open a score report or challenge a vendor's claim — reliability, validity, norms, cut scores, item statistics and fairness analysis — because that is the vocabulary buyers are handed without explanation and the one that decides whether a number can carry a decision.

• Test–retest reliability

  Also called Temporal stability

  Test–retest reliability is the correlation between the scores of the same people measured twice with an interval between sittings. It is the most intuitive form of reliability and the least forgiving, because it exposes both measurement noise and genuine change in the person, and the two are difficult to separate.

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