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The theory of the estimation of test reliability

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Abstract

The theoretically best estimate of the reliability coefficient is stated in terms of a precise definition of the equivalence of two forms of a test. Various approximations to this theoretical formula are derived, with reference to several degrees of completeness of information about the test and to special assumptions. The familiar Spearman-Brown Formula is shown to be a special case of the general formulation of the problem of reliability. Reliability coefficients computed in various ways are presented for comparative purposes.

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Kuder, G.F., Richardson, M.W. The theory of the estimation of test reliability. Psychometrika 2, 151–160 (1937). https://doi.org/10.1007/BF02288391

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  • DOI: https://doi.org/10.1007/BF02288391

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