Abstract
Extensive extinction greatly reduces response rate and increases the relative frequency of short interresponse times, but does not affect temporal learning or operant response rate. In each of two experiments, 24 rats were trained in a multiple cued interval procedure with three stimuli (noise, light, and clicker) at three intervals (30, 60, and 120 sec). In Experiment 1, after 50 sessions of extinction, response rate decreased from about 25 to 0.5 responses/min, but temporal discriminations were maintained and the initial response gradients in reacquisition had a pattern that corresponded with the original (rather than current) training conditions. In Experiment 2, these results were replicated and extended by examination of the effect of stimulus duration on response patterns during extinction, but its lack of effect on reacquisition. The similarity of the initial performance in reacquisition to the asymptotic performance in acquisition was presumably due to the similarity of context. The individual subject data may be downloaded from www.psychonomic.org/archive.
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This research was supported by National Institute of Mental Health Grant MH44234 to Brown University. The authors express appreciation to Mika MacInnis, Linlin Yi, and Marcelo Caetano for discussion about the experiments and manuscript.
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Guilhardi, P., Church, R.M. The pattern of responding after extensive extinction. Learning & Behavior 34, 269–284 (2006). https://doi.org/10.3758/BF03192883
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DOI: https://doi.org/10.3758/BF03192883