Online research in philosophy

Prologue : narratocracy and the contours of political life -- From nomos to nomad : Kant, Deleuze, and Rancière on sensation -- The piazza, the edicola, and the noise of the utterance -- Machiavelli's theory of sensation and Florence's vita festiva -- The viewing subject : Caravaggio, Bacon, and the ring -- "You're eating too fast!" slow food's ethos of convivium -- Epilogue : "the photographs tell it all" : on an ethics of appearance.

Constructivist and ecological approaches are also observed in tactile perception studies. The question is whether identification and localization are dissociated in the tactile modality as well, and whether Norman's conception may be generalized to the field of touch. An analogue to blindsight was evidenced in passive touch, but no such dissociation was observed in active touch. A study is in progress in this domain.

I set out two theses. The first is Lynn Robertson’s: (a) spatial awareness is a cause of object perception. A natural counterpoint is: (b) spatial awareness is a cause of your ability to make accurate verbal reports about a perceived object. Zenon Pylyshyn has criticized both. I argue that nonetheless, the burden of the evidence supports both (a) and (b). Finally, I argue conscious visual perception of an object has a different causal role to both: (i) non-conscious perception of the object, and (ii) experience, e.g. hallucination, that may be subjectively indiscriminable from, but is not, perception of the object.

Often, sensory input underdetermines perception. One such example is the perception of illusory contours. In illusory contour perception, the content of the percept includes the presence of a contour that is absent from the informational content of the sensation. (By “sensation” I mean merely information-bearing events at the transducer level. I intend no further commitment such as the identification of sensations with qualia.) I call instances of perception underdetermined by sensation “underdetermined perception.” The perception of illusory contours is just one kind of underdetermined perception. The focus of this chapter is another kind of underdetermined perception: what I shall call "active perception". Active perception occurs in cases in which the percept, while underdetermined by sensation, is determined by a combination of sensation and action. The phenomenon of active perception has been used by several to argue against the positing of representations in explanations of sensory experience, either by arguing that no representations need be posited or that far fewer than previously thought need be posited. Such views include, but are not limited to those of Gibson (1966, 1986), Churchland.

Touch requires that one move in concert with one's tactile object. This provokes the question how joint movement of this sort yields perception of tactile qualities of the object vs. tactile qualities of an object-augmented body. Phenomenological analysis together with results of dynamic systems theory (in psychology) suggest that the difference stems from 'resonant' vs. 'reverberant' modalities of body-object movement. The further suggestion is that tactile movement is itself a form of discriminative intelligence, and that the peculiar intimacy of touch and movement can shed light on a general role of movement in perception, subject-object relations, and intelligence.

I’m now looking at a soccer ball and a Nintendo Game Cube, and thus am having a perceptual experience of a sphere and a cube. My friend, blind from birth, (who’s helping me with the cleaning) is touching these items, and is thus having a perceptual experience of the same things. Not only are we perceiving the same items, but in doing so we apply the terms ‘sphere’ and ‘cube’, respectively, to them. Are we, in doing so, applying the same, or different, perceptual concepts?