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Acoustic facilitation of object movement detection during self-motion

  • Authors
  • Calabro, F.; Soto-Faraco, S.; Vaina, L. M
  • UPF authors
  • SOTO FARACO, SALVADOR;
  • Type
  • Articles de recerca
  • Journal títle
  • Proceedings of the Royal Society of London. Series B, Biological sciences
  • Publication year
  • 2011
  • Volume
  • 278
  • Number
  • 1719
  • Pages
  • 2840-2847
  • ISSN
  • 0080-4649
  • Publication State
  • Publicat
  • Abstract
  • In humans, as well as most animal species, perception of object motion is critical to successful interaction with the surrounding environment. Yet, as the observer also moves, the retinal projections of the various motion components add to each other and extracting accurate object motion becomes computationally challenging. Recent psychophysical studies have demonstrated that observers use a flow-parsing mechanism to estimate and subtract self-motion from the optic flow field. We investigated whether concurrent acoustic cues for motion can facilitate visual flow parsing, thereby enhancing the detection of moving objects during simulated self-motion. Participants identified an object (the target) that moved either forward or backward within a visual scene containing nine identical textured objects simulating forward observer translation. We found that spatially co-localized, directionally congruent, moving auditory stimuli enhanced object motion detection. Interestingly, subjects who performed poorly on the visual-only task benefited more from the addition of moving auditory stimuli. When auditory stimuli were not co-localized to the visual target, improvements in detection rates were weak. Taken together, these results suggest that parsing object motion from self-motion-induced optic flow can operate on multisensory object representations.
  • Complete citation
  • Calabro, F.; Soto-Faraco, S.; Vaina, L. M. Acoustic facilitation of object movement detection during self-motion. Proceedings of the Royal Society of London. Series B, Biological sciences 2011; 278(1719): 2840-2847.
Bibliometric indicators
  • 24 times cited Scopus
  • 21 times cited WOS
  • Índex Scimago de 3.555(2011)