Background:
Among the five distinct categories of personality domain, the Extraversion-Introversion continuum is the most stable personality trait across a person's lifespan.
In his theory, Eysenck notes that one's level of cortical arousal explains their degree of extraversion. In research related to personality dimension, the P300 Event Related Potential component is most notably investigated in relation to extraversion. It is the cognitive evoked potential appearing at about 300 millisecond following task related stimuli.
Objective:
To compare and correlate P 300 amplitude & latency of cognitive evoked potential response among extraverts & introverts
Methodology:
The Universiti Sains Malaysia Personality Inventory (USMaP-i) was used to assess the personality of the participants in the age group of 18-35 years of either gender and they were categorized into specific personality trait- Extravert & Introvert. The participants were assessed for hearing deficit with tuning fork tests (Rinne‘s, Weber‘s & Schwabach‘s test). The recruited participants underwent recording of cognitive event related evoked potential in the research laboratory. P 300 amplitude & latency were analyzed via evoked potential recorder, Medicaid Neurostim apparatus.
Result:
The current study revealed that there exists significant differences in P 300 amplitude & latency among extraverts & introverts
Conclusion:
There exists inherent differences in the personality among the people living in our society and once we tend to acknowledge the same, we can live in a more harmonious relationship with each other.
Key words: Personality, Extraversion, Introversion, Cortical arousal, Cognitive evoked potential, P 300.
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