The present invention is directed to an apparatus for identifying the rate of frequency at which a person perceives distinct visual images or sounds. The device, product and method comprise means for presenting the image(s) or sounds, means for selecting the distinct image(s) or sounds, means for selecting an instance number, presenting the image or sound in an amount equal to the instance number, the distinct image being displayed on a screen, the sound being presented via a speaker, at a first frequency rate at which frequency the person in unable to perceive the correct number of images or sounds, means for decreasing the frequency rate presentation of the distinct image or sound to a second frequency rate, the second frequency rate being the frequency at which the person is able to perceive individual occurrences of the image or sound in an amount equal to the instance number, and capturing the value of the second display frequency. The captured display frequencies are instrumental in assessing and determining the rate or speed at which the tested person's brain perceives images or sound.
