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Reaction time crossover in schizotypal subjects
1Department of Psychology, College of William and Mary, Williamsburg, Virginia 23187-8795.
The Journal of Nervous and Mental Disease
|January 1, 1993
Summary
Schizotypy, measured by the Physical Anhedonia Scale (PAS), is linked to reaction time crossover patterns. These patterns in individuals with schizotypy resemble those seen in schizophrenia, suggesting a potential neurodevelopmental connection.
Area of Science:
- Psychology
- Neuroscience
- Psychopathology
Background:
- Schizotypy is characterized by traits resembling schizophrenia.
- Reaction time crossover is a phenomenon observed in cognitive tasks.
- Chapman's Physical Anhedonia Scale (PAS) measures schizotypal traits.
Purpose of the Study:
- To investigate the relationship between reaction time crossover and schizotypy.
- To determine if individuals with high schizotypy exhibit specific reaction time patterns.
Main Methods:
- Twenty college students identified with schizotypy via PAS and 20 controls participated.
- A computerized Rodnick and Shakow crossover reaction time task was administered.
- Data analysis focused on the interaction between preparatory interval duration and presentation pattern.
Main Results:
- The hypothesized reaction time crossover interaction was observed in PAS-identified schizotypics.
- Schizotypal subjects showed reaction time crossover patterns similar to schizophrenic populations.
- These findings suggest a shared cognitive mechanism between schizotypy and schizophrenia.
Conclusions:
- Physical Anhedonia Scale-identified schizotypy is associated with specific reaction time crossover patterns.
- These patterns may indicate a neurodevelopmental continuum from schizotypy to schizophrenia.
- The study supports the use of reaction time tasks in understanding schizotypal cognition.