Differently perceptible types of stimuli are applied to the a test subject and the test subject is set intellectual tasks which, in the presence of a stimulus, are intended to be performed according to the nature of this stimulus. In a plurality of test steps a particular type of stimulus is chosen from the set of possible types of stimuli and applied to the person. During or after the application of the respective stimulus, EEG data of the person are determined and recorded preferably within 1 to 10 seconds. Classification analysis is used to determine a measure of whether the EEG data assigned to a defined stimulus are distinguishable from the EEG data assigned to a stimulus of a different type. The measure of the distinguishability of the EEG data of different stimuli is used as a measure of the perceptive faculty.
