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Hemisphere dynamics in lexical access: automatic and controlled priming.

C Chiarello

    Brain and Language
    |September 1, 1985
    PubMed
    Summary
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    Brain hemispheres process words differently. The right hemisphere excels with spelling and meaning, while the left uses sound and meaning, impacting lexical access and organization.

    Area of Science:

    • Cognitive Neuroscience
    • Psycholinguistics
    • Neuroscience

    Background:

    • Lexical processing exhibits hemisphere differences, potentially due to asymmetric organization or access procedures.
    • Understanding these asymmetries is crucial for comprehending language processing in the brain.

    Purpose of the Study:

    • To investigate hemisphere differences in lexical processing.
    • To differentiate between asymmetries in lexical organization and processing procedures.
    • To determine how orthographic, phonological, and semantic information is processed by each hemisphere.

    Main Methods:

    • Six lateralized lexical decision experiments were conducted.
    • Controlled (high probability) priming assessed lexical access procedures.
    • Automatic (low probability) priming evaluated spread of activation and lexical organization.

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    Main Results:

    • Orthographic priming was stronger in the left visual field (right hemisphere).
    • Phonological priming was stronger in the right visual field (left hemisphere).
    • Semantic priming showed bilateral effects, stronger in the left visual field (right hemisphere).

    Conclusions:

    • Hemispheres utilize different information for lexical access.
    • Evidence supports hemisphere asymmetries in both lexical organization and directed processing.
    • The right hemisphere accesses orthographic and semantic information; the left accesses phonological and semantic information.