Answer:
computers are used in a number of diffwerent ways. They tend to be used to compaire statitistics such as spearmans Rho or to measure certain aspects.
Dement and Kleitman used an eeg electro ensela graph to measure the brainwaves of participants to see if they were dreamig while alseep.
Sperry created a computer to flash a image to one side of the visiual field in the eye at 0.010th of a second so quick enough for your brain to spot it but not your eye.
hope this helps x