Mitchell, M. (1990). Copycat: A computer model of high-level perception and conceptual slippage in analogy making. PhD thesis, University of Michigan, Ann Arbor, Michigan.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....make an e in the same style The most difficult problem here is figuring out what the same style means. There is something extremely slippery here. Transferring stylistic aspects from one letter to another involves the sort of slippability discussed in [Hofstadter, 1979] Hofstadter, 1987] [Mitchell, 1990],and [Hofstadter and Mitchell, 1991] Stylistic qualities of one letter cannot usually be directly transferred to another; rather, they must be slipped into variants of the same type so that they fit within the conceptual framework of the new letter without bending it beyond recognition. Letter ....

....attach syntactic labels lo hi lo hi lo hi lo hi lo hi lo hi Figure 9: How a b might be recognized by the recognizer evaluator. The wiggly shapes at the bottom should not be thought of as shapes, but as roles. 22 The two main predecessors of Letter Spirit are Copycat and Tabletop [Mitchell, 1990][French, 1992] The recognizer evaluator architecture is based on their architectures. Both Copycat and Tabletop create micro domain analogies in psychologically plausible ways. Both are based on models of emergent, high level perception making use of a novel type of architecture that falls ....

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Mitchell, M. (1990). Copycat: A computer model of high-level perception and conceptual slippage in analogy making. PhD thesis, University of Michigan, Ann Arbor, Michigan.

....perceptual processes: high level concepts influence low level perceptual processing, while what is perceived at a low level affects the activation of high level concepts as a representation of the situation is constructed. 1 The Copycat project, designed by Hofstadter and Mitchell (1992; Mitchell, 1990, 1993; Mitchell 1 The conceptual level is the level at which concepts begin to play a role; a concept is anything from object recognition (e.g. recognizing an apple) to the ability to grasp complex relations and situations (e.g. that Bill Clinton is in the Democratic Party) Hofstadter, ....

Mitchell, M. (1990). Copycat: A computer model of highlevel perception and conceptual slippage in analogymaking.

....we will examine here works in a domain of alphabetical letter strings. This domain is simple enough that the problems of low level perception are avoided, but complex enough that the main issues in high level perception arise and can be studied. The model, the Copycat program (Hofstadter 1984; Mitchell 1990; Hofstadter and Mitchell 1992) is capable of building up its own representations of situations in this domain, and does so in a flexible, contextdependent manner. Along the way, many of the central problems of high level perception are dealt with, using mechanisms that have a much broader range ....

....exploration of many possible paths toward a representation; the radical restructuring of perceptions, when necessary. The description of Copycat given here will necessarily be brief and oversimplified, but further details are available elsewhere (Hofstadter 1984; Mitchell and Hofstadter 1990; Mitchell 1990; Hofstadter and Mitchell 1992) The Copycat domain The task of the Copycat program is to make analogies between strings of letters. For instance, it is clear to most people that abc and iijjkkll share common structure at some level. The goal of the program is to capture this by building, for each ....

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Mitchell, M. (1990). Copycat: A computer model of high-level perception and conceptual slippage in analogy-making. Doctoral dissertation, University of Michigan.

....developing a parallel architecture in which bottom up and top down processes coexist and cooperate gracefully. It made use of a Blackboard system that integrated information from a variety of processing levels. The three main predecessors of Letter Spirit are Jumbo [Hofstadter, 1983] Copycat 3 [Mitchell, 1990], and Tabletop [French, 1992] The Letter Spirit architecture is closely related to their architectures. Copycat and Tabletop solve analogy problems in microdomains using psychologically plausible methods. Both are models of high level perception making use of a novel type of architecture that ....

Mitchell, M. (1990). Copycat: A Computer Model of High-level Perception and Conceptual Slippage in Analogy Making. PhD thesis, University of Michigan, Ann Arbor, Michigan.

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Mitchell, M. 1990. Copycat: A computer model of high-level perception and conceptual slippage in analogy making.

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