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The determination of item difficulty when chance success is a factor

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Abstract

The evaluation of the level of difficulty of a test item is ordinarily derived from the proportion of a specified population passing or failing the item. With items that have a limited number of alternative responses there must be a correction in this proportion to make allowance for chance success. A table of corrected proportions is given for different numbers of alternatives varying from two to eight.

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  1. University of Nebraska, USA

    J. P. Guilford

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  1. J. P. Guilford
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Guilford, J.P. The determination of item difficulty when chance success is a factor. Psychometrika 1, 259–264 (1936). https://doi.org/10.1007/BF02287877

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  • DOI: https://doi.org/10.1007/BF02287877

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