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    Delayed reentrant processing impairs visual awareness: An object-substitution-masking study

    Access Status
    Fulltext not available
    Authors
    Dux, P.
    Visser, T.
    Goodhew, S.
    Lipp, Ottmar
    Date
    2010
    Type
    Journal Article
    
    Metadata
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    Citation
    Dux, P. and Visser, T. and Goodhew, S. and Lipp, O. 2010. Delayed reentrant processing impairs visual awareness: An object-substitution-masking study. Psychological Science. 21 (9): pp. 1242-1247.
    Source Title
    Psychological Science
    DOI
    10.1177/0956797610379866
    ISSN
    0956-7976
    School
    School of Psychology and Speech Pathology
    URI
    http://hdl.handle.net/20.500.11937/31464
    Collection
    • Curtin Research Publications
    Abstract

    In object-substitution masking (OSM), a sparse, common-onset mask impairs perception of a target when the mask's offset is later than the target's offset and spatial attention is dispersed. OSM is thought to reflect the interaction of feed-forward and reentrant processes in the brain: Upon stimulus presentation, a low-resolution representation of the target and mask progresses from sensory to anterior brain regions, triggering reentrant processing to confirm stimulus identity. It is hypothesized that dispersing spatial attention prolongs the required reentrant iterations, increasing the likelihood that only the lingering mask stimulus will remain physically present and thus substitute for the target in consciousness. However, empirically, it remains unclear whether substitution stems from delayed feed-forward or reentrant processing. Here, we demonstrate that delayed reentrant processing causes OSM, by showing that a task tapping high-level brain regions involved in reentrant processing leads to a spatially attended target being replaced by the mask. Our results confirm a key role for reentrant processing in conscious perception. © The Author(s) 2010.

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