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  • Title: Real-time processing of serial stimuli in classical conditioning of the rabbit's nictitating membrane response.
    Author: Kehoe EJ, Horne PS, Macrae M, Horne AJ.
    Journal: J Exp Psychol Anim Behav Process; 1993 Jul; 19(3):265-83. PubMed ID: 8340769.
    Abstract:
    Real-time models contend that a conditioned stimulus (CS) gives rise to a cascade of hypothetical stimuli that govern conditioned responses (CRs) on a moment-by-moment basis. Experiments with the rabbit nictitating membrane response successfully extended these models to external stimuli. CSs were trained in sequence with an unconditioned stimulus (CSA-CSB-US). When the CSA-CSB interval was shortened, the CR was compressed; when the CSA-CSB interval was lengthened, the CR was broadened. Peaks appeared at 2 places, namely, 1 following CSA by a period equal to its CS-US interval and another following CSB by its CS-US interval. Outside the sequence, the individual CSs evoked CRs located between their respective CS-US intervals. When, however, the 2 CSs were trained separately, the CRs were appropriate to their respective CS-US intervals when tested alone or in sequence. The results are discussed in terms of the J.E. Desmond and J.W. Moore (1988) and S. Grossberg and N.A. Schmajuk (1989) models.
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