Abstract
Case IV of the Kuder-Richardson series, their formula (21), is derived as a generalized split-half Spearman-Brown coefficient. The basic assumption employed is shown to be sufficient to justify the various assumptions used in derivations by other authors. Some of the implications of this assumption are discussed.
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References
Cronbach, L. J. Coefficient alpha and the internal structure of tests.Psychometrika, 1951,16, 297–334.
Kuder, G. F. and Richardson, M. W. The theory of the estimation of test reliability.Psychometrika, 1937,2, 151–160.
Lord, F. M. Sampling fluctuations resulting from the sampling of test items.Psychometrika, 1955,20, 1–22.
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Lyerly, S.B. The Kuder-Richardson formula (21) as a split-half coefficient, and some remarks on its basic assumption. Psychometrika 23, 267–270 (1958). https://doi.org/10.1007/BF02289239
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DOI: https://doi.org/10.1007/BF02289239