POST-TASK EVENT-RELATED-POTENTIAL (ERP) CORRELATES OF PSYCHOMETRIC INTELLIGENCE.
The standard psychometric scores show a fair degree of correlation with event-related evoked potential (ERP) latencies and amplitude. Since, both latency and amplitude are known to change during mental activity, it becomes important to consider both pre- and post-task ERP parameters is such correlative studies. In the present study, we have compared the psychometric scores obtained through WAIS-PR with evoked potential latencies and amplitude recorded at 2 sessions, one before, and the other immediately after a brief period of rigorous mental task. A negative corrrelation (-0.4) was found between the IQ of a subject and his P300 latency. Moreover, there was a positive correlation (+0.4) between the IQ of a subject and the latency changes of his P300 following mental exercise (post-task P300 latency minus pre-task P300 latency). Hence, there appears to be a reserve in 'latency increase' proportional to the IQ, which is manifest only following a mental task.
Department of Physiology, University College of Medical Sciences & G.T.B Hospital, Shahdara, Delhi, - 110 095.
S S
SS
Sircar
O P
OP
Tandon
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A
Chaturvedi
D000293:Adolescent; D018913:Event-Related Potentials, P300; D006801:Humans; D007360:Intelligence; D000297:Psychology, Adolescent; D011594:Psychometrics; D011930:Reaction Time