Abstract
Pigeons were trained consecutively on two simultaneous visual discriminations. For half the Ss, the dimension relevant in the first problem remained relevant in the second (intradimensional shift); for the remainder, the dimension irrelevant in the first problem became relevant in the second (extradimensional shift). As is predicted by two-stage theories of discrimination learning, the intradimensional shift was learned more rapidly than the extradimensional shift.
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This research was supported by Grant APA-259 from the National Research Council of Canada.
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Mackintosh, N.J., Little, L. Intradimensional and extradimensional shift learning by pigeons. Psychon Sci 14, 5–6 (1969). https://doi.org/10.3758/BF03336395
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DOI: https://doi.org/10.3758/BF03336395