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Phenomenology and the Senses

Representationalism is the view that the phenomenal character of a perceptual experience is determined by its content. It seems to follow from representationalism that visual and tactile experiences of an object's shape have the same phenomenal characterthat there's no difference between what it's like to visually experience the shape and what it's like to tactilely experience the shape. But this seems false. After all, one can introspectively notice the difference between a visual experience of an object's shape and a tactile one even when one is both seeing and feeling that shape at the same time. Thus the representationalist lacks an account of the distinctiveness of the phenomenology of experiences of "common sensibles" in different sense modalities. My goal is to provide the representationalist with just such an account, drawing on recent empirical work on intramodal attention (e.g., Talsma 2006, 2008 and Macaluso 2002.

Science of Consciousness Conference Abstract Representationalism is the view that the phenomenal character of a perceptual experience is determined by its content. It seems to follow from representationalism that visual and tactile experiences of an object’s shape have the same phenomenal character – that there’s no difference between what it’s like to visually experience the shape and what it’s like to tactilely experience the shape. But this seems false. After all, one can introspectively notice the difference between a visual experience of an object’s shape and a tactile one even when one is both seeing and feeling that shape at the same time. Thus the representationalist lacks an account of the distinctiveness of the phenomenology of experiences of “common sensibles" in different sense modalities. My goal is to provide the representationalist with just such an account, drawing on recent empirical work on intramodal attention (e.g., Talsma 2006, 2008 and Macaluso 2002). I begin with a seeming platitude: each sense represents a different range of properties. Vision represents, e.g., colour and shape, whereas touch represents shape and hardness, etc. The latter fact can’t by itself explain why seeing a given shape feels different from touching it since, as noted above, seeing a shape feels different from touching it even when you’re seeing and touching the object (shape) at the same time. But certain facts about intramodal attention provide the needed addition. Specifically, when you visually attend to an object’s shape, the effects of attention spread to your representations of other properties apprehended through vision, but not to those apprehended through touch. Hence if I visually focus on an object’s shape, my representation of its colour will be enhanced (e.g., may become more fine-grained) as well, though my representation of its hardness will not. The same seems true of the other senses. Consequently, on the assumption that noticing phenomenological differences between visual and tactile experiences of shape requires switching between visual and tactile attention, we can explain why a visual experience of shape feels visual, as opposed to tactile, by appeal to the fact that whenever you visually attend to shape, the representation of other properties in the range unique to vision is enhanced relative to the range of properties represented through touch, causing the visual experience of shape to take on a distinctly visual feel by association. Nonetheless, we retain the representationalist claim that insofar as two experiences in different modalities represent the same information, they have the same phenomenal character.