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Marr's three levels: A re-evaluation


Marr's account of the analysis of complex information-processing tasks as having three levels — the levels of computational theory, representation and algorithm, and hardware implementation — is reconsidered. I argue that the notion of “level” here runs together two distinctive sort of explanatory shifts — that of grain and that of contextual function. I then offer a revision of the account which avoids this problem, and suggest how this might play a role in the practice of theory evaluation.

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  • Broadbent, D. (1985), ‘A Question of Levels: Comment on McClelland and Rumelhart’, Journal of Experimental Psychology: General 114, pp. 189–192.

    Google Scholar 

  • Fodor, J. A. (1974), ‘Special Sciences, or the Disunity of Science as a Working Hypothesis’, Synthese 28, pp. 97–115.

    Google Scholar 

  • Fodor, J. A. (1987), Psychosemantics: The Problem of Meaning in the Philosophy of Mind, Cambridge, Mass., M.I.T. Press.

    Google Scholar 

  • Glass, A., Holyoak, K., and Santa, J. (1979), Cognition, Reading, Mass., Addison-Wesley.

    Google Scholar 

  • Kitcher, P. (1984), ‘1953 and All That: A Tale of Two Sciences’, Philosophical Review 93, pp. 335–373.

    Google Scholar 

  • Marr, D. (1982), Vision: A Computational Approach, San Francisco, Freeman & Co.

    Google Scholar 

  • McClamrock, R. (in press), ‘Methodological Individualism Considered as a Constitutive Principle of Scientific Inquiry’, forthcoming in Philosophical Psychology.

  • McClelland, J. and Rumelhart, D. (1985), ‘Levels Indeed! A Response to Broadbent’, Journal of Experimental Psychology: General 114, pp. 189–192.

    Google Scholar 

  • Oatley, K. (1980), Perception and Representation, New York, Free Press.

    Google Scholar 

  • Pylyshyn, Z. (1984), Computation and Cognition, Cambridge, Mass., M.I.T. Press.

    Google Scholar 

  • Simon, H. (1981), ‘The Architecture of Complexity’, in H. Simon, The Sciences of the Artificial, Cambridge, Mass., M.I.T. Press, pp. 193–229.

    Google Scholar 

  • Smolensky, P. (1988), ‘On the Proper Treatment of Connectionism’, Behavioral and Brain Sciences 11, pp. 1–23.

    Google Scholar 

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McClamrock, R. Marr's three levels: A re-evaluation. Minds and Machines 1, 185–196 (1991).

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