Naturalistic stimulus structure determines the integration of audiovisual looming signals in binocular rivalry.

Rapid integration of biologically relevant information is crucial for the survival of an organism. Most prominently, humans should be biased to attend and respond to looming stimuli that signal approaching danger (e.g. predator) and hence require rapid action. This psychophysics study used binocular...

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Autores principales:	Verena Conrad, Mario Kleiner, Andreas Bartels, Jessica Hartcher O'Brien, Heinrich H Bülthoff, Uta Noppeney
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d6f2dcbb9ec0415e88b8a63a158ec7b0
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spelling	oai:doaj.org-article:d6f2dcbb9ec0415e88b8a63a158ec7b02021-11-18T08:58:02ZNaturalistic stimulus structure determines the integration of audiovisual looming signals in binocular rivalry.1932-620310.1371/journal.pone.0070710https://doaj.org/article/d6f2dcbb9ec0415e88b8a63a158ec7b02013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24015176/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Rapid integration of biologically relevant information is crucial for the survival of an organism. Most prominently, humans should be biased to attend and respond to looming stimuli that signal approaching danger (e.g. predator) and hence require rapid action. This psychophysics study used binocular rivalry to investigate the perceptual advantage of looming (relative to receding) visual signals (i.e. looming bias) and how this bias can be influenced by concurrent auditory looming/receding stimuli and the statistical structure of the auditory and visual signals. Subjects were dichoptically presented with looming/receding visual stimuli that were paired with looming or receding sounds. The visual signals conformed to two different statistical structures: (1) a 'simple' random-dot kinematogram showing a starfield and (2) a "naturalistic" visual Shepard stimulus. Likewise, the looming/receding sound was (1) a simple amplitude- and frequency-modulated (AM-FM) tone or (2) a complex Shepard tone. Our results show that the perceptual looming bias (i.e. the increase in dominance times for looming versus receding percepts) is amplified by looming sounds, yet reduced and even converted into a receding bias by receding sounds. Moreover, the influence of looming/receding sounds on the visual looming bias depends on the statistical structure of both the visual and auditory signals. It is enhanced when audiovisual signals are Shepard stimuli. In conclusion, visual perception prioritizes processing of biologically significant looming stimuli especially when paired with looming auditory signals. Critically, these audiovisual interactions are amplified for statistically complex signals that are more naturalistic and known to engage neural processing at multiple levels of the cortical hierarchy.Verena ConradMario KleinerAndreas BartelsJessica Hartcher O'BrienHeinrich H BülthoffUta NoppeneyPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 8, p e70710 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Verena Conrad Mario Kleiner Andreas Bartels Jessica Hartcher O'Brien Heinrich H Bülthoff Uta Noppeney Naturalistic stimulus structure determines the integration of audiovisual looming signals in binocular rivalry.
description	Rapid integration of biologically relevant information is crucial for the survival of an organism. Most prominently, humans should be biased to attend and respond to looming stimuli that signal approaching danger (e.g. predator) and hence require rapid action. This psychophysics study used binocular rivalry to investigate the perceptual advantage of looming (relative to receding) visual signals (i.e. looming bias) and how this bias can be influenced by concurrent auditory looming/receding stimuli and the statistical structure of the auditory and visual signals. Subjects were dichoptically presented with looming/receding visual stimuli that were paired with looming or receding sounds. The visual signals conformed to two different statistical structures: (1) a 'simple' random-dot kinematogram showing a starfield and (2) a "naturalistic" visual Shepard stimulus. Likewise, the looming/receding sound was (1) a simple amplitude- and frequency-modulated (AM-FM) tone or (2) a complex Shepard tone. Our results show that the perceptual looming bias (i.e. the increase in dominance times for looming versus receding percepts) is amplified by looming sounds, yet reduced and even converted into a receding bias by receding sounds. Moreover, the influence of looming/receding sounds on the visual looming bias depends on the statistical structure of both the visual and auditory signals. It is enhanced when audiovisual signals are Shepard stimuli. In conclusion, visual perception prioritizes processing of biologically significant looming stimuli especially when paired with looming auditory signals. Critically, these audiovisual interactions are amplified for statistically complex signals that are more naturalistic and known to engage neural processing at multiple levels of the cortical hierarchy.
format	article
author	Verena Conrad Mario Kleiner Andreas Bartels Jessica Hartcher O'Brien Heinrich H Bülthoff Uta Noppeney
author_facet	Verena Conrad Mario Kleiner Andreas Bartels Jessica Hartcher O'Brien Heinrich H Bülthoff Uta Noppeney
author_sort	Verena Conrad
title	Naturalistic stimulus structure determines the integration of audiovisual looming signals in binocular rivalry.
title_short	Naturalistic stimulus structure determines the integration of audiovisual looming signals in binocular rivalry.
title_full	Naturalistic stimulus structure determines the integration of audiovisual looming signals in binocular rivalry.
title_fullStr	Naturalistic stimulus structure determines the integration of audiovisual looming signals in binocular rivalry.
title_full_unstemmed	Naturalistic stimulus structure determines the integration of audiovisual looming signals in binocular rivalry.
title_sort	naturalistic stimulus structure determines the integration of audiovisual looming signals in binocular rivalry.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/d6f2dcbb9ec0415e88b8a63a158ec7b0
work_keys_str_mv	AT verenaconrad naturalisticstimulusstructuredeterminestheintegrationofaudiovisualloomingsignalsinbinocularrivalry AT mariokleiner naturalisticstimulusstructuredeterminestheintegrationofaudiovisualloomingsignalsinbinocularrivalry AT andreasbartels naturalisticstimulusstructuredeterminestheintegrationofaudiovisualloomingsignalsinbinocularrivalry AT jessicahartcherobrien naturalisticstimulusstructuredeterminestheintegrationofaudiovisualloomingsignalsinbinocularrivalry AT heinrichhbulthoff naturalisticstimulusstructuredeterminestheintegrationofaudiovisualloomingsignalsinbinocularrivalry AT utanoppeney naturalisticstimulusstructuredeterminestheintegrationofaudiovisualloomingsignalsinbinocularrivalry
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Naturalistic stimulus structure determines the integration of audiovisual looming signals in binocular rivalry.

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