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Related Experiment Videos

Automatic versus controlled semantic priming in schizophrenia

B A Ober1, S Vinogradov, G K Shenaut

  • 1Department of Human and Community Development, University of California, Davis 95616, USA. baober@ucdavis.edu

Neuropsychology
|November 5, 1997
PubMed
Summary

Paranoid schizophrenia patients exhibit significantly reduced semantic priming compared to controls. This suggests altered cognitive processing in schizophrenia, particularly in automatic priming tasks.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Psychiatry

Background:

  • Schizophrenia is a complex mental disorder affecting cognition.
  • Semantic priming, a measure of cognitive processing, may reveal deficits in schizophrenia.

Purpose of the Study:

  • To investigate semantic priming differences between individuals with schizophrenia (paranoid and nonparanoid subtypes) and healthy controls.
  • To examine the impact of stimulus onset asynchrony (SOA) on semantic priming in these groups.

Main Methods:

  • A single-choice lexical decision task was employed.
  • Participants included 31 individuals with schizophrenia and 20 healthy controls.
  • Two priming conditions were used: automatic (260 ms SOA) and controlled (1,000 ms SOA).

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Main Results:

  • The paranoid schizophrenia subgroup showed significantly less semantic priming than controls.
  • The nonparanoid subgroup exhibited a trend towards reduced priming compared to controls.
  • Priming effects were larger in the controlled condition than the automatic condition, irrespective of group.
  • Zero semantic priming was observed only in schizophrenic subgroups under automatic priming conditions.

Conclusions:

  • Individuals with paranoid schizophrenia display impaired semantic priming, indicating disrupted associative semantic networks.
  • Cognitive processing deficits in schizophrenia are more pronounced in automatic priming.
  • These findings contribute to understanding the cognitive underpinnings of schizophrenia.