EEG was recorded with international 10-10 system in the same clinic where psychiatric evaluations were made. Data were recorded using Nihon Kohden Amplifier and with the sampling rate of 500 Hz, power-line notch-filtered at 50 z, and band-pass filtered at 0.5–60 Hz. EEG was recorded with open and closed eye, each for 10 minutes. Segmentation of EEG was considered as 2-second epochs. Artifacts caused by eyeball movements were refined using Gratton et al. algorithm (1983). Neuriguid software and Fourier transformation software were used to quantify EEG data. The relative power among all components resulting from quantitative analysis of the cortex activity was used.