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Learning to Learn: Real-Time Features and a Connectionist Model

University of New South Wales

Amanda J. Horne

University of New South Wales

Michaela Macrae

University of New South Wales

Two experiments used classical conditioning to examine transfer of response features specific to the warning interval between a conditioned stimulus (CS) and an unconditioned stimulus (US). Rabbits were given initial training with a stimulus (CSA) in one modality (tone) at a designated interval (e.g., 200 ms). In a second stage, the conditioned response (CR) to CSA was extinguished. Finally, training was shifted to a new stimulus (CSB) in another modality (light) at a new interval (e.g., 400 ms). Compared to rest controls, there was an enhanced rate of CR acquisition to CSB and a tendency for early CRs to CSB to reflect the CSA-US interval. However, the extinction procedure and the change in CS-US interval together reduced these two aspects of transfer across stimulus modalities. The findings are discussed in terms of their implications for theories of cross-modal transfer. A layered network with real-time features is offered.

Key Words: transfer of learning • classical conditioning • rabbit • nictitating membrane • connectionist modeling

Adaptive Behavior, Vol. 3, No. 3, 235-271 (1995)
DOI: 10.1177/105971239500300301


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