Abstract
On any one trial, 10 rats had reward available for one of two alternatives, where the probability of reward for each alternative was 85:15, 70:30, or 30:70. The side on which reward was available was held constant until the rat responded to the rewarded side. First-choice trials, defined as trials following reward, revealed asymptotic probability matching in individual rats. Analysis of the error-run distributions revealed that Ss may have learned a conditional discrimination, i.e., trials following reward yielded probability matching behavior, while trials following nonreward at asymptote were largely to the side opposite the nonrewarded side.
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This research was supported in part by a grant from the Emory University Grant Fund.
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Robbins, D., Warner, P.L. Individual organism probability matching with rats in a two-choice task. Bull. Psychon. Soc. 2, 405–407 (1973). https://doi.org/10.3758/BF03334429
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DOI: https://doi.org/10.3758/BF03334429