期刊
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
卷 278, 期 1719, 页码 2840-2847出版社
ROYAL SOC
DOI: 10.1098/rspb.2010.2757
关键词
flow parsing; visual search; multisensory perception; visual motion; auditory motion
资金
- NIH [RO1NS064100]
- Ministerio de Ciencia e Innovacion [PSI2010-15426, CSD2007-00012]
- Comissionat per a Universitats i Recerca del DIUE [SRG2009-092]
- European Research Council [StG-2010 263145]
- Sound Field Laboratory at Sargent College, Boston University [P30 DC04663]
- ICREA Funding Source: Custom
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.
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