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Relationship between crossover and modality shift effects in sequential reaction time performance of schizophrenic
European Archives of Psychiatry and Clinical Neuroscience
|January 1, 1993
Summary
This study examined attentional dysfunction in schizophrenia using the crossover effect (COE) and modality shift effect (MSE). Findings indicate these effects measure distinct aspects of attention, not always impaired together in patients.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Psychiatry
Background:
- Attentional dysfunctions are a core feature of schizophrenia.
- The crossover effect (COE) and modality shift effect (MSE) are established indicators of these deficits.
- The relationship between COE and MSE in schizophrenia remains underexplored.
Purpose of the Study:
- To investigate the relationship between the crossover effect (COE) and modality shift effect (MSE) in schizophrenia.
- To examine correlations between these attentional indicators and clinical variables.
- To determine if COE and MSE reflect common or distinct attentional impairments.
Main Methods:
- Reaction time measurements were used to assess COE and MSE.
- 50 schizophrenia inpatients and 50 healthy controls participated.
- Correlations with psychopathology, subjective complaints, illness duration, and medication were analyzed.
Main Results:
- Earlier findings for COE and MSE were replicated in the patient group.
- No significant correlation was found between COE and MSE.
- Neither COE nor MSE showed significant correlations with the analyzed clinical variables.
Conclusions:
- COE and MSE appear to assess different, independent aspects of attention in schizophrenia.
- Attentional deficits in schizophrenia may manifest selectively, affecting different cognitive functions to varying degrees.
- These findings suggest a nuanced understanding of attentional impairments in schizophrenia is necessary.