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    Audiovisual time perception is spatially specific

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    Publication date
    2012
    Author
    Heron, James
    Roach, N.W.
    Hanson, James Vincent Michael
    McGraw, Paul V.
    Whitaker, David J.
    Keyword
    Adaptation
    ; Auditory perception
    ; Discrimination
    ; Humans
    ; Orientation
    ; Space perception
    ; Time perception
    ; Visual erception
    ; REF 2014
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Our sensory systems face a daily barrage of auditory and visual signals whose arrival times form a wide range of audiovisual asynchronies. These temporal relationships constitute an important metric for the nervous system when surmising which signals originate from common external events. Internal consistency is known to be aided by sensory adaptation: repeated exposure to consistent asynchrony brings perceived arrival times closer to simultaneity. However, given the diverse nature of our audiovisual environment, functionally useful adaptation would need to be constrained to signals that were generated together. In the current study, we investigate the role of two potential constraining factors: spatial and contextual correspondence. By employing an experimental design that allows independent control of both factors, we show that observers are able to simultaneously adapt to two opposing temporal relationships, provided they are segregated in space. No such recalibration was observed when spatial segregation was replaced by contextual stimulus features (in this case, pitch and spatial frequency). These effects provide support for dedicated asynchrony mechanisms that interact with spatially selective mechanisms early in visual and auditory sensory pathways.
    URI
    http://hdl.handle.net/10454/6016
    Version
    No full-text in the repository
    Citation
    Heron J, Roach NW, Hanson JVM et al (2012) Audiovisual time perception is spatially specific. Experimental Brain Research. 218(3): 477-85.
    Link to publisher’s version
    http://dx.doi.org/10.1007/s00221-012-3038-3
    Type
    Article
    Collections
    Life Sciences Publications

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