Document Detail

Counting visual and tactile events: the effect of attention on multisensory integration.
MedLine Citation:
PMID:  19933568     Owner:  NLM     Status:  MEDLINE    
Irrelevant events in one sensory modality can influence the number of events that are perceived in another modality. Previously, the underlying process of sensory integration was studied in conditions in which participants knew a priori which sensory modality was relevant and which was not. Consequently, (bottom-up) sensory interference and (top-down) selective attention were confounded. We disentangled these effects by measuring the influence of visual flashes on the number of tactile taps that were perceived, and vice versa, in two conditions. In the cue condition, participants were instructed on which modality to report before the bimodal stimulus was presented. In the no-cue condition, they were instructed after stimulus presentation. Participants reported the number of events that they perceived for bimodal combinations of one, two, or three flashes and one, two, or three taps. Our main findings were that (1) in no-cue conditions, the influence of vision on touch was stronger than was the influence of touch on vision; (2) in cue conditions, the integration effects were smaller than those in no-cue conditions; and (3) irrelevant taps were less easily ignored than were irrelevant flashes. This study disentangled previously confounded bottom-up and top-down effects: The bottom-up influence of vision on touch was stronger, but vision was also more easily suppressed by top-down selective attention. We have compared our results qualitatively and quantitatively with recently proposed sensory-integration models.
Peter J Werkhoven; Jan B F van Erp; Tom G Philippi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Attention, perception & psychophysics     Volume:  71     ISSN:  1943-393X     ISO Abbreviation:  Atten Percept Psychophys     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-11-25     Completed Date:  2010-02-01     Revised Date:  2011-02-24    
Medline Journal Info:
Nlm Unique ID:  101495384     Medline TA:  Atten Percept Psychophys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1854-61     Citation Subset:  IM    
School of Psychology, University of Wollongong, Wollongong, NSW 2522, Australia.
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MeSH Terms
Association Learning*
Discrimination (Psychology)*
Photic Stimulation
Serial Learning
Touch Perception*
Visual Perception*
Young Adult

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