<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "From Robotic Toil to Symbolic Theft: Grounding Transfer from Entry-Level to Higher-Level Categories"^^ . "Neural network models of categorical perception (compression of within-category similarity\nand dilation of between-category differences) are applied to the symbol-grounding problem\n(of how to connect symbols with meanings) by connecting analog sensorimotor projections to\narbitrary symbolic representations via learned category-invariance detectors in a hybrid\nsymbolic/nonsymbolic system. Our nets are trained to categorize and name 50x50 pixel\nimages (e.g., circles, ellipses, squares and rectangles) projected onto the receptive field of a\n7x7 retina. They first learn to do prototype matching and then entry-level naming for the four\nkinds of stimuli, grounding their names directly in the input patterns via hidden-unit\nrepresentations (\"sensorimotor toil\"). We show that a higher-level categorization (e.g.,\n\"symmetric\" vs. \"asymmetric\") can learned in two very different ways: either (1) directly\nfrom the input, just as with the entry-level categories (i.e., by toil), or (2) indirectly, from\nboolean combinations of the grounded category names in the form of propositions describing\nthe higher-order category (\"symbolic theft\"). We analyze the architectures and input\nconditions that allow grounding (in the form of compression/separation in internal similarity\nspace) to be \"transferred\" in this second way from directly grounded entry-level category\nnames to higher-order category names. Such hybrid models have implications for the\nevolution and learning of language."^^ . "2000" . . "12" . . "Connection Science"^^ . . . . . . . . . . . . . . "Angelo"^^ . "Cangelosi"^^ . "Angelo Cangelosi"^^ . . "Alberto"^^ . "Greco"^^ . "Alberto Greco"^^ . . "Stevan"^^ . "Harnad"^^ . "Stevan Harnad"^^ . . . . . . "From Robotic Toil to Symbolic Theft: Grounding Transfer from Entry-Level to Higher-Level Categories (Postscript)"^^ . . . . . . "cangelosi-connsci2.ps"^^ . . "HTML Summary of #1647 \n\nFrom Robotic Toil to Symbolic Theft: Grounding Transfer from Entry-Level to Higher-Level Categories\n\n" . "text/html" . . . "Cognitive Psychology" . . . "Neural Nets" . .