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    The two-process theory of biological motion processing

    Hirai, M. and Senju, Atsushi (2020) The two-process theory of biological motion processing. Neuroscience & Biobehavioral Reviews , ISSN 0149-7634. (In Press)

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    Perception, identification, and understanding of others’ actions from motion information are vital for our survival in the social world. A breakthrough in the understanding of action perception was the discovery that our visual system is sensitive to human action from the sparse motion input of only a dozen point lights, a phenomenon known as biological motion (BM) processing. Previous psychological and computational models cannot fully explain the emerging evidence for the existence of BM processing during early ontogeny. Here, we propose a two-process model of the mechanisms underlying BM processing. We hypothesize that the first system, the ‘Step Detector,’ rapidly processes the local foot motion and feet-below-the-body information that is specific to vertebrates, is less dependent on postnatal learning, and involves subcortical networks. The second system, the ‘Bodily Action Evaluator,’ slowly processes the fine global structure-from-motion, is specific to conspecific, and dependent on gradual learning processed in cortical networks. This proposed model provides new insight into research on the development of BM processing.


    Item Type: Article
    Keyword(s) / Subject(s): Biological motion, Developmental changes, Point-light walker, Subcortical network, Two-process theory
    School: School of Science > Psychological Sciences
    Depositing User: Administrator
    Date Deposited: 10 Jan 2020 13:48
    Last Modified: 02 Jul 2021 19:46


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