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Do concurrent verbal memory loads influence the verbal laterality pattern in the bilateral task?

P D Duda

    Brain and Language
    |September 1, 1983
    PubMed
    Summary
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    Concurrent verbal memory loads impact word recognition accuracy, especially for words reported second in the right visual field. This finding suggests modifications to hemispheric organization models.

    Area of Science:

    • Cognitive psychology
    • Neuroscience
    • Psycholinguistics

    Background:

    • Hemispheric specialization suggests the left hemisphere is dominant for verbal processing.
    • Previous research indicates right visual field superiority for word recognition.

    Purpose of the Study:

    • To investigate how concurrent verbal memory load affects recognition accuracy in a bilateral presentation task.
    • To examine the influence of memory load size and complexity on visual field laterality patterns.
    • To explore the role of word report order in memory load effects on verbal processing.

    Main Methods:

    • Participants completed a recognition accuracy task with bilaterally presented nouns under varying memory loads (3 or 6 words; concrete or abstract).
    • Controlled and free word report orders were implemented across six experimental groups (n=20 per group).

    Related Experiment Videos

  • Analysis focused on right visual field superiority and interactions between memory load, report order, and visual field.

    • Main Results:

    • A significant right visual field superiority for verbal processing was confirmed.
    • No main effects of memory load size or complexity on laterality patterns were observed.
    • Significant interactions revealed that words reported second were more susceptible to memory load interference, particularly in the right visual field.

    Conclusions:

    • Data support a structural model of hemispheric organization for verbal processing.
    • Interaction effects necessitate modifications to existing models to include hemispheric capacity limits and report order.
    • The findings highlight the dynamic interplay between memory load, report order, and visual field in verbal recognition.