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Related Experiment Videos

Cognitive deficits and thought disorder: a retest study.

P D Harvey1, E A Earle-Boyer, J C Levinson

  • 1Department of Psychiatry, Mt. Sinai Medical School, New York, NY 10029.

Schizophrenia Bulletin
|January 1, 1988
PubMed
Summary

Cognitive deficits in manic and schizophrenic patients were assessed. Thought disorder severity influenced cognitive performance over time in mania, while distraction ability impacted thought disorder in schizophrenia.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Thought disorder is a core symptom in psychiatric conditions like mania and schizophrenia.
  • Cognitive deficits are frequently observed in these disorders, but their temporal relationship with thought disorder is not fully understood.

Purpose of the Study:

  • To investigate the stability of cognitive functions and thought disorder over a short interval.
  • To examine the cross-temporal relationships between cognitive deficits (reality monitoring, distraction performance) and thought disorder in manic and schizophrenic patients.

Main Methods:

  • A digit span distraction task and a reality monitoring task were administered to manic, schizophrenic, and normal subjects.
  • Clinical assessment of thought disorder was conducted twice over a 4-day interval.

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  • Cross-temporal analyses were used to assess predictive relationships between cognitive performance and thought disorder.

    • Main Results:

    • Reality monitoring, distraction performance, and thought disorder were stable over the 4-day retest interval.
    • Manic and schizophrenic samples showed distinct correlational patterns between cognitive deficits and thought disorder subtypes.
    • In mania, thought disorder severity predicted distraction performance, but not vice versa.
    • In schizophrenia, distraction performance predicted positive thought disorder severity over time, while reality monitoring did not.

    Conclusions:

    • Cognitive deficits and thought disorder exhibit distinct temporal dynamics in mania and schizophrenia.
    • Distraction performance appears to be a more significant cross-temporal predictor of thought disorder in schizophrenia than reality monitoring.