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Randomly parallel tests and Lyerly's basic assumption for the Kuder-Richardson formula (21)

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Abstract

The K-R (21) formula can be derived without recourse to the undesirable assumption that the test items are all indistinguishable.

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References

  1. Lord, F. M. Sampling fluctuations resulting from the sampling of test items.Psychometrika, 1955,20, 1–22.

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  2. Lord, F. M. Tests of the same length do have the same standard error of measurement.Educ. psychol. Measmt, in press.

  3. Lord, F. M. Statistical inferences about true scores.Psychometrika, 1959,24, 1–17.

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  4. Lyerly, S. B. The Kuder-Richardson formula (21) as a split-half coefficient, and some remarks on its basic assumption.Psychometrika, 1958,23, 267–270.

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Authors and Affiliations

  1. Educational Testing Service, USA

    Frederic M. Lord

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  1. Frederic M. Lord
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Lord, F.M. Randomly parallel tests and Lyerly's basic assumption for the Kuder-Richardson formula (21). Psychometrika 24, 175–177 (1959). https://doi.org/10.1007/BF02289829

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  • DOI: https://doi.org/10.1007/BF02289829

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