The sound-induced flash illusion: auditory modulation of visual M-pathway activity

van der Zwan, Ricky, Cottrell, David, Reid, Russell, and Brooks, Anna (2007) The sound-induced flash illusion: auditory modulation of visual M-pathway activity. In: Paper presented at 8th Annual Meeting of the International Multisensory Research Forum, p. 121. From: IMRF2007: 8th Annual Meeting of the International Multisensory Research Forum, 5-7 July 2007, Sydney, NSW, Australia.

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Abstract

When a single flash of a visual stimulus is accompanied by two auditory beeps, the single flash is perceived as two flashes. A growing body of evidence suggests that the auditory information influences visual processing very early in the visual processing pathway, perhaps in V1 (REFS??). This paper presents evidence that the Shams misperception is based specifically on the modulation of early M-pathway responses by auditory input. Targets that selectively and coherently drive the M-pathway, such as a high contrast flashed disc, result in a strong illusion. However, when target and background are not coherently defined by contrast but are by hue so that hue is the only reliable difference between target and background, the illusion is destroyed completely. These findings are consistent with the illusion arising via visual-auditory interactions within the occipital lobe and possibly in area V1.

Item ID: 17546
Item Type: Conference Item (Poster)
Date Deposited: 23 Nov 2011 05:59
FoR Codes: 17 PSYCHOLOGY AND COGNITIVE SCIENCES > 1701 Psychology > 170112 Sensory Processes, Perception and Performance @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970117 Expanding Knowledge in Psychology and Cognitive Sciences @ 100%
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