Abstract

GEMPP, René  and  SAIZ, José L. Livingston K² Coefficient and the Reliability of a Dichotomous Decision in a Psychological Test. Univ. Psychol. [online]. 2014, vol.13, n.1, pp.217-226. ISSN 1657-9267.

The reliability of test scores is one of the most important psychometric properties of a psychological test. However, the tests are often used for dichotomous classifications of people, as in tests used for screening or recruitment purposes. In such cases, the conventional reliability coefficients are not suitable for estimating the accuracy of the classifications. This paper introduces the coefficient K² of Livingston (1972, 1973) and demonstrates its use through two empirical examples to estimate the reliability of a classification based on psychological tests.

Keywords : reliability; classification; screening; recruitment; reliability coefficient; methodology; statistics; measurement and evaluation.

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