72. The computer readable medium of claim 50 containing digital information which when executed further causes the processor or processors to use said refined or predicted multimedia label data to perform a search of said stored multimedia data.
50. A computer readable medium containing digital information which when executed cause a processor or processors to: present selected multimedia data to a first user; determine user interest in said selected multimedia data based upon brain signal responses of the first user; generate selected multimedia label data corresponding to the selected multimedia data based on the determination of user interest; based on at least said generated selected multimedia label data, perform at least one of refining multimedia label data associated with said selected multimedia data or predicting new multimedia label data pertaining to said stored multimedia data by calculating a classification function.