A system and method for determining a quality of contact of an electroencephalogram (EEG) electrode is described. An electrode is connected to a user to detect brainwave activity from the user. An EEG application computes a voltage of the electrode, computes a derivative of the voltage of the electrode, computes a coefficient of variation from the derivative of the voltage, and determines a quality of contact of the electrode to the user based on the coefficient of variation.
