PubMed · 13971365
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J W BLACK, HAAGENCH. 1963. Multiple-choice intelligibility tests, forms A and B.. https://doi.org/10.1044/jshd.2801.77
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A group of 15 college students was exposed to repeated trials of a task in which money was available for choosing among three colors (blue, red, and green). The amount of winning tokens for each color was varied across phases to test whether group distribution would track the ratio of winning tokens between patches. Confirming previous reports on ideal free performance in humans, group choice proved sensitive to the available resources but tended to undermatch the ratio of winning tokens. The difference-equalization rule of Sokolowski, Tonneau, and Freixa i Baqué [Psychonom. Bull. Rev. 6 (1999) 157] gave a satisfactory fit to the data.
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