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Related Experiment Videos

Attention, eye tracking and schizophrenia.

W Acker, B Toone

    The British Journal of Social and Clinical Psychology
    |June 1, 1978
    PubMed
    Summary

    Smooth Pursuit Eye-Tracking (SPET) performance differentiates schizophrenic patients from controls. Attentional deficits, not the disorder itself, appear to explain impaired SPET performance in schizophrenia.

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    Area of Science:

    • Neuroscience
    • Psychiatry
    • Cognitive Psychology

    Background:

    • Smooth Pursuit Eye-Tracking (SPET) is a validated method for differentiating individuals with schizophrenia from healthy controls.
    • Previous research suggests that behavioral factors during testing may influence SPET performance in schizophrenic patients.

    Purpose of the Study:

    • To replicate the finding that SPET performance differentiates schizophrenic patients from controls.
    • To investigate the impact of attentional deficits on SPET performance in schizophrenia.
    • To examine the effect of experimentally induced distraction on SPET performance in healthy individuals.

    Main Methods:

    • Two experiments were conducted. Experiment 1 involved SPET testing on clinically diagnosed schizophrenic patients and normal controls, with concurrent behavioral ratings.
    • Experiment 2 involved assessing SPET performance in normal controls under conditions of experimentally induced distraction with varying task difficulties.

    Main Results:

    • SPET performance statistically differentiated schizophrenic patients from normal controls.
    • Schizophrenic performance impairment was associated with behaviors thought to preclude optimal attention.
    • Increased difficulty of competing tasks in normal controls led to progressively greater impairment in SPET performance.

    Conclusions:

    • SPET performance is sensitive to superficial inattention.
    • Attentional deficits provide a more parsimonious explanation for impaired SPET performance in schizophrenic patients than the disorder itself.
    • These findings support the role of attentional dysfunction in the observed eye-tracking deficits in schizophrenia.

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