EEG AVERAGE FREQUENCY AND INTELLIGENCE

An investigation of the relationship between the average frequency of the EEG and WAIS I.Q. scores indicated a strong relationship between I.Q. and average frequency asymmetries in left and right homologous areas. The correlations were higher in the posterior areas and for Performance I.Q. A composite score of all EEG areas tested, which took into account the negative correlations of the occipital areas (frontal + temporal + parietal - occipital), showed for the Thinking condition a Spearman Rho with Verbal I.Q. of 0.59, with performance I.Q. of 0.78, and with Full I.Q. of 0.72. Alpha index correlations were also higher during the Thinking conditions and Performance I.Q. © 1969.