Abstract
Goldfish in a successive differential discrimination displayed strong negative contrast. A successive nondifferential shift in reward magnitude did not produce clear negative contrast, however. Response speed changed appropriately when reward magnitudes were changed. There was no indication of positive contrast in either condition.
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This is a preliminary report of aspects of research to be subsequently reported in greater detail. The research was supported by MH 19961 from the National Institute of Mental Health.
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Cochrane, T.L., Scobie, S.R. & Fallon, D. Negative contrast in goldfish (Carassius auratus). Bull. Psychon. Soc. 1, 411–413 (1973). https://doi.org/10.3758/BF03334388
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DOI: https://doi.org/10.3758/BF03334388