A cognitive/multisensory stimulation system simulates real sports action/job task scenarios for assessing, profiling, practicing, improving or rehabilitating cognitive function performance of athletes or individuals. Cognitive function improvement can be provided by: establishing with a subject a sensory semantic language for relating a number of sensory signals to corresponding possible actions, the sensory semantic language being essentially new to the subject； instructing the athlete to perform an task involving sport/job skills； providing to the subject during the task sensory signals requiring rapid discernment by the subject of the semantic meaning of the sensory signal to correctly chose one possible action； and determining whether the subject correctly responds to the selected sensory signal during the task； obtaining a cognitive-sensor reaction-time map over a visual field of the subject； and repeating the steps over multiple repeated tasks using selectively randomized sensory signals selected to progressively restore the cognitive-sensor reaction-time map a normal profile.
