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Related Experiment Videos

Cognitive inhibition and schizophrenic symptom subgroups

L M Williams1

  • 1Department of Psychology, University of New England, Armidale, NSW, Australia.

Schizophrenia Bulletin
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

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Schizophrenia subgroups show altered priming effects, suggesting weakened inhibition underlies positive symptoms like disorganization and reality distortion, but not negative symptoms. This impacts how patients process information.

Area of Science:

  • Cognitive Neuroscience
  • Psychiatry
  • Clinical Psychology

Background:

  • Schizophrenia is characterized by positive and negative symptoms.
  • Priming effects, including positive (repetition) and negative (unattended) priming, are cognitive processes.
  • Previous research suggests cognitive deficits in schizophrenia, but subgroup differences in priming are not fully understood.

Purpose of the Study:

  • To investigate repetition and semantic priming in different schizophrenia subgroups.
  • To examine priming under attended and unattended conditions.
  • To explore the relationship between symptom dimensions and inhibitory processes in schizophrenia.

Main Methods:

  • Cluster analysis of positive and negative symptom ratings (Schedule for the Assessment of Positive Symptoms, Schedule for the Assessment of Negative Symptoms).

Related Experiment Videos

  • Assessment of repetition and semantic priming under attended and unattended conditions.
  • Comparison of priming effects across identified schizophrenia subgroups (Disorganization, Reality Distortion, Psychomotor Poverty, Episodic).

    • Main Results:

    • Three subgroups (Disorganization, Reality Distortion, Episodic) showed reduced or reversed negative priming in unattended conditions.
    • These three subgroups also exhibited reversed positive priming for repetition.
    • The Psychomotor Poverty subgroup displayed typical negative and positive priming effects.

    Conclusions:

    • Weakened inhibitory processes may underlie positive symptoms (reality distortion, disorganization) in schizophrenia.
    • Negative symptoms associated with psychomotor poverty are not linked to reduced inhibition.
    • A "reduced inhibition" model may need to incorporate preattentive processing influences for positive symptoms.