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Related Experiment Videos

Shadowing by context in schizophrenia

D R Hemsley, P H Richardson

    The Journal of Nervous and Mental Disease
    |March 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Schizophrenia patients struggle with selective attention tasks, performing significantly worse than depressives and normal individuals. This suggests a defect in the "pigeonholing" stage of attention processing in schizophrenia.

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    Area of Science:

    • Cognitive Psychology
    • Neuroscience
    • Psychopathology

    Background:

    • Selective attention is crucial for processing complex auditory information.
    • Previous research suggests attentional deficits in schizophrenia.
    • Broadbent's model distinguishes between filtering and pigeonholing mechanisms.

    Purpose of the Study:

    • To investigate selective auditory attention in individuals with schizophrenia.
    • To determine if attentional deficits in schizophrenia are related to filtering or pigeonholing.
    • To test the applicability of Broadbent's model to schizophrenic attention.

    Main Methods:

    • A binaural listening task was employed, presenting simultaneous prose passages.
    • Participants (schizophrenics, depressives, normal controls) were instructed to shadow one passage.

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  • Passages were designed to be physically inseparable, demanding cognitive selection.

    • Main Results:

    • Schizophrenic participants demonstrated significantly impaired performance compared to control groups.
    • Performance deficits were more pronounced than in depressive or normal participants.
    • Results align with a defect in the pigeonholing (response set) stage of attention.

    Conclusions:

    • Schizophrenia is associated with a specific deficit in the pigeonholing stage of selective attention.
    • Evidence for a filtering (stimulus set) deficit in schizophrenia remains inconclusive.
    • Findings support a cognitive model of attentional dysfunction in schizophrenia.