1. A method for evaluating an EEG of a person under anaesthesia or in intensive care comprising: (a) measuring EEG curves of the person through a plurality of stages; (b) determining time or frequency domain parameters from the measured EEG curves; (c) inserting the determined parameters into multivariate classification functions; (d) automatically allocating said functions into the stages of the EEG; (e) determining limit values of the parameters, including EEG signal strength in relation to a base line and correcting the multivariate classification functions using the limit values; (f) determining movement artifacts caused by movements during the EEG; and (g) suppressing allocation into stages based on an evaluation of the movement artifacts.