By Mark H Bickhard
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Additional resources for On the nature of representation: a case study of James Gibson's theory of perception
These errors, we suggest, have unfortunately obscured Gibson's basic insights and, we argue later, may well have inhibited critical developments in Gibson's own model. The section is intended both as an analysis and as a clarification of these issues per se and as a prelude to later discussions. MEMORY IN PERCEPTION In sensation-based models of perception, sensations are presumed to undergo informationally enhancing processing to yield perceptions. A major component of that processing has been assumed to be some sort of comparisons of sensations or retinal images with memories or the activation of associations to memories.
The second involves an analysis of what properties of the light could possibly be directly picked up, that is, transduced, to serve as foundations for those inferences. We consider these two analyses to be the core components of Fodor and Pylyshyn's position. At the level of generality at which they are stated, in fact, they form the essential foundations of any version of the strongest form of the encoding approach to perception; the mediated encoding approach. We argue, respectively, (1) that the case for mediating inferences based on the pickup of properties of light is invalid when the interactive possibility is taken into account and (2) that the attempt to define transduction, of any properties, is internally incoherent.
Of course, be detected but then we would no be cOllsi<:ierins: would have been abandoned. en(:oclm~;s of the of course, must must be as to a r. "ri to P. But P was itself to have been transduced in the first so as to itself the inferences the basic models of can be based. oel~celDticJn, the problem that transduction is has been and we an infinite regress. ) Fodor and Pylyshyn's move, of basing transduction on necessary and sufficient causal relationships, epistemically buys nothing. As Fodor and Pylyshyn point out (though in a different context), "The existence of a correlation [or an identity 1between two states of affairs does not, in and of itself, explain how the detection [or generation] of one of them could eventuate in ...