Abstract
Moore and Stickney (1980) described a real-time computational version of Mackintosh’s (1975) attentional model of associative learning. By assuming that hippocampal lesions affect computations that control the rate of learning, they were able to simulate impairments of latent inhibition and blocking, as reported in studies of classical conditioning. Schmajuk (1984a) proposed that hippocampal lesions affect computations of stimulus associabilities, as defined in Pearce and Hall’s (1980) model of learning. A revised version of the Moore-Stickney model and a real-time version of Pearce and Hall’s (1980) model, both incorporating the proposed modifications for the effect of hippocampal lesions, were applied to different classical conditioning paradigms. Simulation experiments with both models were carried out for the following protocols: acquisition under simultaneous, delay, and trace conditioning; partial reinforcement; noncontingent training; conditioned inhibition; differential conditioning; extinction; latent inhibition; blocking; overshadowing; and discrimination reversal. Although some discrepancies between simulation experiments and relevant literature were noted, both models proved capable of simulating most hippocampal lesion effects.
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This study was supported in part by a fellowship to the first author based on NSF Grant IST8417756 and by AFORS Grant 83-0215 to the second author.
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Schmajuk, N.A., Moore, J.W. Real-time attentional models for classical conditioning and the hippocampus. Psychobiology 13, 278–290 (1985). https://doi.org/10.3758/BF03326534
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DOI: https://doi.org/10.3758/BF03326534