Enhancement of visual perception by crossmodal visuo-auditory interaction |
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Authors: | Frassinetti Francesca Bolognini Nadia Làdavas Elisabetta |
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Institution: | (1) Dipartimento di Psicologia, Università degli Studi di Bologna, Viale Berti Pichat, 5-40127 Bologna, Italy,;(2) Centro di Neuroscienze Cognitive, Cesena, Italy, |
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Abstract: | Neurophysiological studies have shown in animals that a sudden sound enhanced perceptual processing of subsequent visual
stimuli. In the present study, we explored the possibility that such enhancement also exists in humans and can be explained
through crossmodal integration effects, whereby the interaction occurs at the level of bimodal neurons. Subjects were required
to detect visual stimuli in a unimodal visual condition or in crossmodal audio-visual conditions. The spatial and the temporal
proximity of multisensory stimuli were systematically varied. An enhancement of the perceptual sensitivity (d') for luminance
detection was found when the audiovisual stimuli followed a rather clear spatial and temporal rule, governing multisensory
integration at the neuronal level.
Electronic Publication |
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Keywords: | Crossmodal integration Visual-acoustic interaction Perceptual sensitivity |
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