1. A method for correlating pupillary response to the cognitive activity of a subject comprising: monitoring the pupillary response of a subject undergoing an evaluation of cognitive activity which includes at least one task; recording the pupillary response of the subject to the task; subjecting the recorded pupillary response to wavelet analysis in order to identify any dilation reflex of the subject's pupil during the task; and assigning a pupillary response value to the result of the wavelet analysis as a measure of the cognitive activity.