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Related Experiment Videos

Cross-modal semantic priming in schizophrenia.

Simon Surguladze1, Susan Rossell, Sophia Rabe-Hesketh

  • 1Division of Psychological Medicine, Institute of Psychiatry, King's College, London, UK.

Journal of the International Neuropsychological Society : JINS
|October 31, 2002
PubMed
Summary

Schizophrenia patients show enhanced cross-modal semantic priming, suggesting altered brain connectivity. This may explain language difficulties in schizophrenia, impacting speech processing.

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Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Clinical Psychology

Background:

  • Implicit memory research shows stimulus modality affects semantic information retrieval.
  • Semantic priming, where exposure to one word influences response to another, is a key area of cognitive research.

Purpose of the Study:

  • To investigate the effects of auditory and visual semantic priming on visual word recognition in patients with schizophrenia and healthy controls.
  • To explore modality-specific and cross-modal priming effects in schizophrenia.

Main Methods:

  • A lexical decision task was used to assess word recognition.
  • Two conditions were employed: ipsimodal (visual prime, visual target) and cross-modal (auditory prime, visual target).
  • Participants included 20 patients with DSM-IV schizophrenia and 26 healthy volunteers.

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Main Results:

  • Both groups exhibited significant priming in both ipsimodal and cross-modal conditions.
  • Schizophrenia patients showed significantly greater cross-modal priming compared to controls.
  • Priming effects did not differ significantly between groups in the ipsimodal condition.
  • Priming effects correlated within conditions for schizophrenia patients only.

Conclusions:

  • Findings suggest priming operates via amodal semantic representations.
  • Schizophrenia may involve increased cross-modal connectivity, potentially impairing language and speech processing.