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  • Electrophysiological correlates of anticipatory and poststimulus components of task switching

    Author(s)
    Karayanidis, F
    Coltheart, M
    Michie, PT
    Murphy, K
    Griffith University Author(s)
    Murphy, Karen A.
    Year published
    2003
    Metadata
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    Abstract
    Task-switching paradigms can shed light on cognitive and neural processes underlying attentional control mechanisms. An alternating runs task-switching paradigm (R. D. Rogers & S. Monsell, 1995) is used to identify ERP components associated with anticipatory and poststimulus components of task-switching processes. Subjects alternated between two tasks in a predictable series (AABB). Reaction time (RT) switch cost reduced with increasing response-stimulus (R-S) interval and a residual switch cost remained at the longest R-S interval. A switch-related positivity (D-Pos) developed in the R-S interval. D-Pos was time-locked to ...
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    Task-switching paradigms can shed light on cognitive and neural processes underlying attentional control mechanisms. An alternating runs task-switching paradigm (R. D. Rogers & S. Monsell, 1995) is used to identify ERP components associated with anticipatory and poststimulus components of task-switching processes. Subjects alternated between two tasks in a predictable series (AABB). Reaction time (RT) switch cost reduced with increasing response-stimulus (R-S) interval and a residual switch cost remained at the longest R-S interval. A switch-related positivity (D-Pos) developed in the R-S interval. D-Pos was time-locked to response onset, peaked around 400 ms post-response onset, and was unaffected by task-set interference. A switch-related negativity (D-Neg) emerged after stimulus onset. D-Neg peaked earlier with increasing R-S interval and its amplitude and latency were affected by task-set interference. D-Pos and D-Neg were interpreted within current models of task-switching.
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    Journal Title
    Psychophysiology
    Volume
    40
    Issue
    3
    Publisher URI
    http://www.blackwell-synergy.com/doi/full/10.1111/1469-8986.00037
    DOI
    https://doi.org/10.1111/1469-8986.00037
    Subject
    Biological Sciences
    Medical and Health Sciences
    Psychology and Cognitive Sciences
    Publication URI
    http://hdl.handle.net/10072/6469
    Collection
    • Journal articles

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