Document Detail


Effects of stimulus duration on audio-visual synchrony perception.
MedLine Citation:
PMID:  22821079     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The integration of visual and auditory inputs in the human brain occurs only if the components are perceived in temporal proximity, that is, when the intermodal time difference falls within the so-called subjective synchrony range. We used the midpoint of this range to estimate the point of subjective simultaneity (PSS). We measured the PSS for audio-visual (AV) stimuli in a synchrony judgment task, in which subjects had to judge a given AV stimulus using three response categories (audio first, synchronous, video first). The relevant stimulus manipulation was the duration of the auditory and visual components. Results for unimodal auditory and visual stimuli have shown that the perceived onset shifts to relatively later positions with increasing stimulus duration. These unimodal shifts should be reflected in changing PSS values, when AV stimuli with different durations of the auditory and visual components are used. The results for 17 subjects showed indeed a significant shift of the PSS for different duration combinations of the stimulus components. Because the shifts were approximately equal for duration changes in either of the components, no net shift of the PSS was observed as long as the durations of the two components were equal. This result indicates the need to appropriately account for unimodal timing effects when quantifying intermodal synchrony perception.
Authors:
I A Kuling; R L J van Eijk; J F Juola; A Kohlrausch
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Publication Detail:
Type:  Journal Article     Date:  2012-07-22
Journal Detail:
Title:  Experimental brain research     Volume:  221     ISSN:  1432-1106     ISO Abbreviation:  Exp Brain Res     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-08-27     Completed Date:  2013-06-11     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0043312     Medline TA:  Exp Brain Res     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  403-12     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Acoustic Stimulation / methods
Adult
Aged
Auditory Perception / physiology*
Feedback, Sensory / physiology
Female
Humans
Male
Middle Aged
Photic Stimulation / methods
Reaction Time / physiology
Time Factors
Time Perception / physiology*
Visual Perception / physiology*
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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