Correlations between theta, alpha and beta EEG spectral power at frontal, parietal and occipital electrode sites.

Electrodes: FZ: frontal central; PZ: parietal-central; O1, O2: occipital left and right. Figures are values for ‘r’. All correlations are significant at p<0.0001. Figures in bold indicate correlations between power in the same frequency band (theta (θ) 3–8 Hz; alpha (α) 8–13 Hz; beta (β) 13–30 Hz) at different locations. EEG data was available for 364 participants.