Evoked cortical potentials and measurement of human abilities.

Abstract

A consistent pattern of reliable correlations of the order of from -.15 to -.32 was found between measures of intelligence and measures of visual average evoked potential latency recorded from the frontoparietal scalp. Measures of fluid and crystallized intelligence correlated to about the same magnitude with evoked potential latency measures. There were significant correlations between measures representing simple cognitive processes (eg., motor-perceptual speed) and evoked potential latency. The average size of ability-latency correlations as well as the number of significant correlations increased as conditions of evoked potential testing which tend to impose alertness on subjects were relaxed.