Enhancement of visual perception by crossmodal visuo-auditory interaction.
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.
Frassinetti
Francesca
F
Dipartimento di Psicologia, Università degli Studi di Bologna, Italy. ffrassinetti@psibo.unibo.it
Bolognini
Nadia
N
Làdavas
Elisabetta
E
D000328:Adult; D000704:Analysis of Variance; D001288:Attention; D001307:Auditory Perception / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D016555:Matched-Pair Analysis; D008960:Models, Psychological; D010812:Physical Stimulation / Q000379:methods; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time; D012684:Sensory Thresholds; D017603:Signal Detection, Psychological; D013017:Sound Localization; D013028:Space Perception; D014796:Visual Perception / Q000502:physiology*