Averaged evoked potentials (AEPs) can provide measures which correlate with more conventional measures of intelligence. By review of current research on three AEP correlates of intelligence, some of the theoretical bases behind the search for such correlates are illustrated and the current potential for their practical applications evaluated.
Callaway E. Correlations Between Averaged Evoked Potentials and Measures of IntelligenceAn Overview. Arch Gen Psychiatry. 1973;29(4):553-558. doi:10.1001/archpsyc.1973.04200040093015