Relative temporal representations in Pavlovian conditioning |
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Authors: | Michele Wan Mamadou Djourthe Peter D Balsam |
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Institution: | a Department of Psychology, Columbia University, 406 Schermerhorn Hall, 1190 Amsterdam Ave., MC5501, New York, NY 10027, United States b Department of Psychology, Barnard College, 415 Milbank Hall, 3009 Broadway, New York, NY 10027, United States c Department of Psychiatry, Division of Cognitive Neuroscience, Columbia University Medical Center, NYSPI Unit 50, 1051 Riverside Drive, New York, NY 10032, United States |
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Abstract: | The transfer of relative temporal representations was assessed in a series of three experiments. In each experiment, rats (Rattus norvegicus) received one set of conditioned stimulus (CS) and intertrial interval (ITI) durations in Phase 1 and another set in Phase 2. The ratio between the CS and ITI intervals was either changed or maintained across phases. On the hypothesis that relative temporal representations are learned, groups receiving maintained temporal ratios across phases were expected to display greater change in responding upon encountering the new intervals. When the CS duration decreased across phases, maintaining the temporal ratio did lead to greater change in Day 1 of Phase 2 towards the final pattern of responding. However, when the CS increased across phases, maintaining the temporal ratio across phases did not facilitate adjustment to the new intervals, suggesting that extinction of previously reinforced times induced new learning. These results provide evidence that under some conditions, relative relationships in temporal maps may survive transformation-of-scale, like relative relationships in spatial maps. |
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Keywords: | Interval Map Rat Representation Temporal Transfer |
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