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Related Experiment Videos

Cognitive control and semantics in schizophrenia: an integrated approach.

Jessica R Cohen1, Brita Elvevåg, Terry E Goldberg

  • 1Clinical Brain Disorders Branch, National Institutes of Mental Health/NIH, Bldg. 10 Rm. 4S235, MSC 1379, Bethesda, MD 20892, USA.

The American Journal of Psychiatry
|October 4, 2005
PubMed
Summary

Individuals with schizophrenia show preserved abilities in representing and using semantic knowledge for cognitive control, similar to healthy individuals. This suggests intact semantic knowledge processing in schizophrenia.

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Area of Science:

  • Cognitive Neuroscience
  • Psychiatry

Background:

  • Cognitive control is crucial for managing semantic knowledge.
  • Schizophrenia is associated with cognitive deficits, but the impact on semantic knowledge representation is unclear.

Purpose of the Study:

  • To investigate whether semantic knowledge representation and processing are selectively impaired in schizophrenia.
  • To determine if cognitive control mechanisms related to semantic knowledge are affected in schizophrenia.

Main Methods:

  • Twenty-four patients with schizophrenia and 24 healthy controls performed a size judgment task with word and image stimuli.
  • Stimuli varied in real-world size difference ('distance') and congruency between real-world and presented size.

Main Results:

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  • Both groups showed similar effects of 'distance' and 'congruency' on task performance.
  • The task was easier with greater real-world size differences and congruent size information.

    • Conclusions:

    • Certain aspects of semantic knowledge representation are preserved in schizophrenia.
    • Patients with schizophrenia utilize semantic knowledge for cognitive control similarly to healthy individuals.