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Related Experiment Videos

Lexical knowledge degradation in schizophrenia.

K R Laws1, M Al-Uzri, A M Mortimer

  • 1Department of Psychology, London Guildhall University, Calcutta House, Old Castle Street, E1 7NT, London, UK. klaws@lgu.ac.uk

Schizophrenia Research
|September 9, 2000
PubMed
Summary
This summary is machine-generated.

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Schizophrenia patients exhibit severe picture naming deficits, similar to neurological patients. Most patients show word storage issues, not just access problems, impacting deliberate lexical retrieval.

Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Clinical Psychology

Background:

  • Schizophrenia is associated with various cognitive impairments.
  • Previous research suggests potential language processing deficits in schizophrenia.
  • Understanding the nature of these deficits is crucial for targeted interventions.

Purpose of the Study:

  • To investigate severe picture naming impairments in chronically hospitalized schizophrenic patients.
  • To differentiate between lexical storage and access disorders in these patients.
  • To examine the consistency and nature of naming deficits over time.

Main Methods:

  • A cohort of 22 chronically hospitalized schizophrenic patients was assessed.
  • Picture naming tasks were administered twice, 18 months apart.

Related Experiment Videos

  • A subset of 11 patients was tested a third time over 30 months.
  • Analysis focused on consistency, word frequency effects, and distinguishing storage vs. access disorders.

    • Main Results:

    • Patients displayed severe picture naming impairments, comparable to neurological patients with left hemisphere lesions.
    • The majority of patients exhibited lexical storage disorders.
    • Access disorders were less common and primarily involved difficulties with deliberate, not automatic, lexical access.

    Conclusions:

    • Severe naming deficits in schizophrenia often stem from degraded lexical representations (storage disorders).
    • Difficulties with deliberate lexical access may also be present, but are less prevalent.
    • Findings highlight the complex nature of language impairments in schizophrenia.