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POST-TASK EVENT-RELATED-POTENTIAL (ERP) CORRELATES OF PSYCHOMETRIC INTELLIGENCE.
S S Sircar1, O P Tandon, A Chaturvedi
1Department of Physiology, University College of Medical Sciences & G.T.B Hospital, Shahdara, Delhi, - 110 095.
Higher IQ scores correlate with increased P300 latency after mental tasks, suggesting cognitive reserve. This study links psychometric scores with event-related evoked potential (ERP) changes during cognitive challenges.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Psychometrics
Background:
- Event-related evoked potentials (ERPs) like P300 show changes in latency and amplitude during mental activity.
- Correlating psychometric scores with ERP parameters requires considering both pre- and post-task measurements.
Purpose of the Study:
- To investigate the relationship between psychometric scores (WAIS-PR) and P300 ERP latencies.
- To examine how mental tasks affect P300 latency and its correlation with IQ.
Main Methods:
- Collected psychometric scores using the WAIS-PR.
- Recorded P300 ERP latencies and amplitudes in two sessions: pre- and post-mental task.
- Analyzed correlations between IQ scores and P300 parameters.
Main Results:
- A negative correlation (-0.4) was observed between IQ and P300 latency.
- A positive correlation (+0.4) was found between IQ and the change in P300 latency after a mental task.
Conclusions:
- Individuals with higher IQ exhibit a greater 'latency increase' in P300 following mental exertion.
- This suggests a cognitive reserve capacity proportional to IQ, revealed by demanding cognitive tasks.
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