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Visual P300 and the self-directedness scale of the Temperament and Character Inventory
A B Vedeniapin1, A P Anokhin, E Sirevaag
1Department of Psychiatry, Washington University School of Medicine, St.Louis, MO 63108, USA. andrei@ethos.wustl.edu
Psychiatry Research
|April 5, 2001
Summary
Reduced P300 brain potentials, linked to psychopathology, were observed in healthy individuals with low self-directedness (SD) personality scores. This suggests SD may be a vulnerability factor for brain dysfunction in psychiatric conditions.
Area of Science:
- Neuroscience
- Psychiatry
- Psychology
Background:
- Reduced P300 event-related brain potential amplitude is linked to psychopathology.
- Low self-directedness (SD) scores on the Temperament and Character Inventory correlate with personality disorder predisposition.
Purpose of the Study:
- To investigate the relationship between P300 amplitudes and SD scores in healthy adults.
- To explore if SD is a potential vulnerability factor for reduced P300 amplitudes.
Main Methods:
- Utilized a visual oddball task to elicit P300.
- Measured P300 amplitudes in 58 healthy participants.
- Correlated P300 amplitudes with self-directedness (SD) scores.
Main Results:
- P300 amplitudes were significantly reduced in participants with low SD scores.
- Correlational analysis and group comparisons supported this finding.
Conclusions:
- Low self-directedness (SD) is associated with reduced P300 amplitudes in healthy individuals.
- This suggests a potential common vulnerability factor linking personality traits to brain function and psychopathology.
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