A method and system affects the mental state of a user through cognitive or attention training by providing or displaying a first auditory or visual stimulus to a user, manipulating one or more features of the stimulus to provide or display a second auditory or visual image stimulus, and repeating the steps of manipulating features of the auditory or visual image stimulus to provide or display one or more additional auditory or visual image stimuli to the user. An electronic/computing device receives input from the user, such as EEG signal information, indicating the users mental state which is evaluated to determine a mood of the user. In response to improvement in the users mood, the user is rewarded with an additional selected auditory or visual image stimulus. Further, based on improvements in the users mood, the manipulation of features and provision or display of the stimuli may be adjusted.
