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Indirect semantic priming in schizophrenic patients

M Spitzer1, U Braun, S Maier

  • 1Psychiatrische Universitätsklinik, Heidelberg, Germany.

Schizophrenia Research
|December 1, 1993
PubMed
Summary

Schizophrenic patients showed a trend for indirect semantic priming at 0 ms, unlike controls. Both groups exhibited this priming effect at a 500 ms interval, suggesting altered semantic network activation in schizophrenia.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Psychiatry

Background:

  • Schizophrenia is a complex mental disorder affecting cognition.
  • Semantic memory network models propose spreading activation.
  • Understanding cognitive processing in schizophrenia is crucial.

Purpose of the Study:

  • To investigate semantic priming effects in schizophrenia.
  • To compare word recognition in schizophrenic patients and controls.
  • To explore the impact of inter-stimulus interval (ISI) on priming.

Main Methods:

  • Lexical decision task with associated, indirectly associated, and non-associated word primes.
  • Comparison between schizophrenic patients and normal controls.
  • Manipulation of inter-stimulus interval (ISI) at 0 ms and 500 ms.

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Main Results:

  • Schizophrenic patients showed a trend for indirect semantic priming at 0 ms ISI.
  • Normal controls did not show indirect semantic priming at 0 ms ISI.
  • Both groups exhibited indirect semantic priming at 500 ms ISI.

Conclusions:

  • Results suggest altered spreading activation in schizophrenic semantic networks.
  • Findings support theories of increased activation or decreased inhibition in schizophrenia.
  • Indirect semantic priming may be a sensitive measure for cognitive deficits in schizophrenia.