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High-level perception -the process of making sense of complex data at an abstract, conceptual levelCis fundamental to human cognition.Through high-level perception, chaotic environmental stimuli are organized into the mental representations that are used throughout cognitive processing.Much work in traditional artificial intelligence has ignored the process of high-level perception, by starting with hand-coded representations. In this paper, we argue that this dismissal of perceptual processes leads to distorted models of human cognition.We examine some existing artificial-intelligence modelsCnotably BACON, a model of scientific discovery, and the Structure-Mapping Engine, a model of analogical thoughtCand argue that these are flawed precisely because they downplay the role of high-level perception. Further, we argue that perceptual processes cannot be separated from other cognitive processes even in principle, and therefore that traditional artificial-intelligence models cannot be defended by supposing the existence of a "representation module" that supplies representations ready-made.Finally, we describe a model of high-level perception and analogical thought in which perceptual processing is integrated with analogical mapping, leading to the flexible build-up of representations appropriate to a given context.

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