HM_PDP - NEURONAL NETWORKS AND CONNECTIONIST (PDP) MODELS...

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Unformatted text preview: NEURONAL NETWORKS AND CONNECTIONIST (PDP) MODELS Thorndikes Law of Effect (1920s) Reward strengthens connections for operant response Hebbs reverberatory circuits (1940s) Self-sustaining circuits of activity This stm consolidates memories Hebbian learning ( Co-occurrence of activation strengthens synaptic paths) Memory as stable changes in connection strengths (CONNECTIONISM) Selfridges Pandemonium (1955) A parallel, distributed model of pattern recognition Selfridges Pandemonium Model of Letter Recognition Rosenblatts Perceptrons (1962) Simple PDP model that could learn Limited to certain kinds of associations Hinton & Anderson (1981) PDP model of associative memory Solves the XOR problem with hidden layers of units Adds powerful new learning algorithms McClelland & Rumelhart (1986) Explorations in the Microstructure of Cognition Shows power and scope of PDP approach Emergence of subsymbolic models and brain metaphor PDP modeling explodes A symbolic-level network model...
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This note was uploaded on 12/01/2011 for the course EXP 4504 taught by Professor Fischler during the Fall '07 term at University of Florida.

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HM_PDP - NEURONAL NETWORKS AND CONNECTIONIST (PDP) MODELS...

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