Relationship between EEG and test intelligence: A critical review

Literature on the relationship of EEG to test intelligence scores is reviewed. Evidence for the relationship between these 2 variables seems strongest for samples of children, institutionalized geriatric patients, mental deficients, and brain-injured persons; and weakest for samples of normal adults. EEG indices seem to be more strongly related to MA than to IQ. Criticisms of the previous research are directed at insufficient attention to the measurement of intelligence, failure to control for sex, too restricted placements of leads, too restricted an employment of EEG indices, and the assessment of EEG performance under inappropriate conditions. (2 p. ref.)