Auditory modulation of visual apparent motion with short spatial and temporal intervals
Author
Kafalıgönül, Hulusi
Stoner, G.
Date
2010Source Title
Journal of Vision
Print ISSN
1534-7362
Publisher
Association for Research in Vision and Ophthalmology
Volume
10
Issue
12
Pages
1 - 13
Language
English
Type
ArticleItem Usage Stats
117
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82
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Abstract
Recently, E. Freeman and J. Driver (2008) reported a cross-modal temporal interaction in which brief sounds drive the
perceived direction of visual apparent-motion, an effect they attributed to “temporal capture” of the visual stimuli by the
sounds (S. Morein-Zamir, S. Soto-Faraco, & A. Kingstone, 2003). Freeman and Driver used “long-range” visual motion
stimuli, which travel over long spatial and temporal intervals and engage high-order cortical areas (K. G. Claeys, D. T. Lindsey,
E. De Schutter, & G. A. Orban, 2003; Y. Zhuo et al., 2003). We asked whether Freeman and Driver’s temporal effects
extended to the short-range apparent-motion stimuli that engage cortical area MT, a lower-order area with well-established
spatiotemporal selectivity for visual motion (e.g. A. Mikami, 1991, 1992; A. Mikami, W. T. Newsome, & R. H. Wurtz, 1986a,
1986b; W. T. Newsome, A. Mikami, & R. H. Wurtz, 1986). Consistent with a temporal-capture account, we found that static
sounds bias the perception of both the direction (Experiment 1) and the speed (Experiment 2) of short-range motion. Our
results suggest that auditory timing may interact with visual spatiotemporal processing as early as cortical area MT.
Examination of the neuronal responses of this well-studied area to the stimuli used in this study would provide a test and
might provide insight into the neuronal representation of time.
Keywords
Audio-visual interactionTemporal ventriloquism
Motion processing
Temporal processing
Visual area MT