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Related Experiment Videos

Perceptual distraction in schizophrenia.

C G Watson1, T Kucala, J Wold

  • 1Veterans Administration Medical Center, St. Cloud, Minnesota 56301.

Journal of Clinical Psychology
|September 1, 1988
PubMed
Summary

Schizophrenia patients do not exhibit a specific deficit in stimulus identification when faced with distractors, especially after tasks are matched for difficulty. This suggests perceptual distractibility is not a primary issue in schizophrenia.

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Area of Science:

  • Cognitive Psychology
  • Psychiatry
  • Neuroscience

Background:

  • Schizophrenia is often associated with cognitive deficits, including potential distractibility.
  • Previous research has not consistently controlled for task difficulty when assessing distractibility in schizophrenia.

Purpose of the Study:

  • To investigate if a distractibility deficit exists at the stimulus-identification level in individuals with schizophrenia.
  • To control for task difficulty when comparing distractibility between schizophrenic and non-schizophrenic participants.

Main Methods:

  • A study involving 110 participants, including process schizophrenics, reactive schizophrenics, and psychiatric controls.
  • Participants identified tachistoscopically presented stimuli under both distractor and non-distractor conditions.

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  • Task difficulty was matched across conditions by adjusting presentation intervals.

    • Main Results:

    • Schizophrenic participants did not show a greater deficit under distractor conditions compared to non-schizophrenic patients.
    • Even before difficulty matching, schizophrenics' performance was not more deficient with distractors than without, relative to controls.
    • The findings indicate no significant difference in perceptual distractibility at the stimulus identification level between schizophrenics and non-schizophrenics when difficulty is controlled.

    Conclusions:

    • Perceptual distractibility at the stimulus identification level is not more pronounced in individuals with schizophrenia than in non-schizophrenics.
    • The results challenge the notion of a specific stimulus-identification-level distractibility deficit in schizophrenia, particularly when task difficulty is accounted for.