Abstract
The main point of this book is to stake out an information-processing view of perception which does not commit itself to the prevailing computational interpretation of organisms' perceptual and cognitive states. According to the prevailing view, perceiving is a matter of constructing an internal representation of the world on the basis of relatively meager sensory information. The construction is thought to proceed formal-causally by means of computational algorithms realized by the neural machinery of the brain and central nervous system. The operation of these "perceptual analysers" is largely biologically determined and is "modular" in the sense that their activity is "sealed off" from consciousness, and only their outputs, perceptual representations, are available to higher order cognitive systems, controlling concepts, beliefs, language, and behavior.