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    Task-set inhibition, conflict, and the n-2 repetition cost: a computational model of task switching

    Sexton, N.J. and Cooper, Richard P. (2015) Task-set inhibition, conflict, and the n-2 repetition cost: a computational model of task switching. In: Dale, R. and Jennings, C. and Maglio, P. and Matlock, T. and Noelle, D. and Warlaumont, A. and Yoshimi, J. (eds.) Proceedings of the 37th Annual Conference of the Cognitive Science Society. Pasadena, U.S.: Cognitive Science Society.

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    In task switching, the n-2 repetition cost (informally, the elevation in RT associated with performing a recently abandoned task) is an indicator of residual task-set inhibition. One suggestion is that such inhibition is triggered by conflict between task-set elements. We present a novel computational model instantiating this proposal, by adding task-conflict monitoring units to an existing, interactive activation model of task switching. The model produces the empirical pattern, n-1 switch costs and n-2 repetition costs, as an intrinsic property of its architecture, but dependent on the inhibition of task demand units by the conflict detection mechanism. In a further simulation, we make predictions about n-2 repetition costs for asymmetric tasks, and show that one functional benefit of such a conflict-based, task inhibition mechanism is to facilitate top-down control of tasks by automatically reducing cross-task interference.


    Item Type: Book Section
    Additional Information: Proceedings of the 37th Annual Meeting of the Cognitive Science Society - Pasadena, California, July 22 - 25, 2015
    Keyword(s) / Subject(s): backward inhibition, conflict monitoring, interactive activation model, task inhibition, task switching
    School: Birkbeck Faculties and Schools > Faculty of Science > School of Psychological Sciences
    Depositing User: Rick Cooper
    Date Deposited: 11 Aug 2015 12:02
    Last Modified: 02 Aug 2023 17:16


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