Abstract
One considers a group S of subjects and one uses the measured values of EEG waves and the levels of anxiety given by the psychologists for the members of S in order to construct a monotone measure µ. This measure µ is such that the levels of anxiety of the members of S are Choquet integrals with respect to µ. One infers that this is true for any other subject. This inference is validated by comparing the values obtained via the above mentioned method with the results given by the psychologists for another group of subjects S’. We think that this procedure is completely new for the computation of the anxiety degree.