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The McGurk effect
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California, USA (Sciencemag): Under normal conditions, we are generally not consciously aware of how stimuli arriving via multiple input pathways (such as sight and sound) are integrated into a single percept; this kind of processing can be uncovered when illusory stimuli are presented (for instance, in the McGurk effect: seeing one word being spoken while hearing a related one).
Behavioral and brain imaging data suggest that the vestibular system relies on an internal model of how the motions of objects are influenced by gravity and passes that information on to the visual processing centers when subjects estimate the time to collision of a falling ball.
For more information, please visit:
www.sciencemag.org/content/vol308/issue5720/twis.shtml
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