Abstract: The system of the invention includes provisions for administering a plurality of tests sequentially to a subject, with each test including a plurality of programmable visual, auditory and/or tactile stimuli and programmed desired responses. The system includes novel circuitry for interrelating the operation of the stimuli and the responses and determining premature, incorrect and correct responses and providing a printout of the reaction time of each response. The system also indicates a response which goes beyond a set maximum time period.