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Updated: Sep 20, 2025

Investigating the Effects of Antipsychotics and Schizotypy on the N400 Using Event-Related Potentials and Semantic Categorization
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Semantic processing features and schizotypal traits: A test-retest study.

Xinyang Yu1, Keren Liao2, Bruce I Turetsky3

  • 1Neuropsychology and Applied Cognitive Neuroscience Laboratory, CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China.

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology
|June 9, 2022
PubMed
Summary
This summary is machine-generated.

Semantic processing measures show good reliability but are not temporally stable. Schizotypal traits correlate with N400 latencies, suggesting potential links warranting further investigation.

Keywords:
N400ReliabilitySchizotypal traitsSemantic primingStability

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Area of Science:

  • Cognitive Neuroscience
  • Psychiatry
  • Psychometrics

Background:

  • Semantic processing deficits are noted in schizophrenia spectrum disorders.
  • The temporal stability of these deficits and their relationship with schizotypal traits remain unclear.

Purpose of the Study:

  • To investigate the temporal stability of semantic processing measures.
  • To examine the correlation between schizotypal traits and semantic processing over time.

Main Methods:

  • Assessed schizotypal traits using the Schizotypal Personality Questionnaire (SPQ).
  • Measured semantic processing via N400 event-related potentials and reaction times at two time points (3 months apart).
  • Employed repeated-measure ANOVA, intraclass correlation coefficient (ICC), and Pearson's r for analysis.

Main Results:

  • Semantic processing measures (behavioral and N400) demonstrated high reliability but low temporal stability.
  • N400 latency for unrelated stimuli correlated with cognitive-perceptual and disorganized schizotypal traits at the second time point.

Conclusions:

  • Semantic processing measures exhibit good reliability.
  • While schizotypal traits correlate with N400 latencies, the long-term stability of this association requires further research.