Auditory Enhancement of Illusory Contour Perception.

Details

Serval ID
serval:BIB_9107B5CEEB0D
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Auditory Enhancement of Illusory Contour Perception.
Journal
Multisensory research
Author(s)
Tivadar R.I., Gaglianese A., Murray M.M.
ISSN
2213-4808 (Electronic)
ISSN-L
2213-4794
Publication state
Published
Issued date
01/06/2020
Peer-reviewed
Oui
Volume
34
Number
1
Pages
1-15
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Abstract
Illusory contours (ICs) are borders that are perceived in the absence of contrast gradients. Until recently, IC processes were considered exclusively visual in nature and presumed to be unaffected by information from other senses. Electrophysiological data in humans indicates that sounds can enhance IC processes. Despite cross-modal enhancement being observed at the neurophysiological level, to date there is no evidence of direct amplification of behavioural performance in IC processing by sounds. We addressed this knowledge gap. Healthy adults ( n = 15) discriminated instances when inducers were arranged to form an IC from instances when no IC was formed (NC). Inducers were low-constrast and masked, and there was continuous background acoustic noise throughout a block of trials. On half of the trials, i.e., independently of IC vs NC, a 1000-Hz tone was presented synchronously with the inducer stimuli. Sound presence improved the accuracy of indicating when an IC was presented, but had no impact on performance with NC stimuli (significant IC presence/absence × Sound presence/absence interaction). There was no evidence that this was due to general alerting or to a speed-accuracy trade-off (no main effect of sound presence on accuracy rates and no comparable significant interaction on reaction times). Moreover, sound presence increased sensitivity and reduced bias on the IC vs NC discrimination task. These results demonstrate that multisensory processes augment mid-level visual functions, exemplified by IC processes. Aside from the impact on neurobiological and computational models of vision, our findings may prove clinically beneficial for low-vision or sight-restored patients.
Keywords
Ophthalmology, Experimental and Cognitive Psychology, Sensory Systems, Cognitive Neuroscience, Computer Vision and Pattern Recognition
Pubmed
Web of science
Funding(s)
Swiss National Science Foundation / Projects / 320030_169206
Create date
22/01/2020 17:01
Last modification date
28/03/2021 6:36
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