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      Serial modules in parallel: The psychological refractory period and perfect time-sharing.

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      Psychological Review
      American Psychological Association (APA)

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          Abstract

          The authors describe ACT-R/perceptual-motor (ACT-R/PM), an integrated theory of cognition, perception, and action that consists of the ACT-R production system and a set of perceptual-motor modules. Each module (including cognition) is essentially serial, but modules run in parallel with one another. ACT-R/PM can model simple dual tasks such as the psychological refractory period (PRP), including subtle results previously explained with executive process interactive control (EPIC, D. E. Meyer & D. E. Kieras, 1997a). The central difference between the theories is that EPIC's productions can fire in parallel, whereas in ACT-R/PM, they are serial. Results from three PRP-like experiments with more demanding cognitive requirements indicate that cognitive processing for the 2 tasks need not overlap. ACT-R's activation-based retrieval processes are critical in accounting for the timing of these tasks and for explaining the dual-task performance decrement.

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          Most cited references16

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          A computational theory of executive cognitive processes and multiple-task performance: Part I. Basic mechanisms.

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            On the division of attention: a disproof of the single channel hypothesis.

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              Chronometric evidence for central postponement in temporally overlapping tasks

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                Author and article information

                Journal
                Psychological Review
                Psychological Review
                American Psychological Association (APA)
                1939-1471
                0033-295X
                2001
                2001
                : 108
                : 4
                : 847-869
                Article
                10.1037/0033-295X.108.4.847
                11699122
                3b7ed896-f25d-4992-b49d-c7770d7c43b6
                © 2001
                History

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