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||(A Literature Review on Reaction Time by Robert J. Kosinski, Clemson University:)"Many researchers have confirmed that reaction to sound is faster than reaction to light, with mean auditory reaction times being 140-160 msec and visual reaction times being 180-200 msec (References). Perhaps this is because an auditory stimulus only takes 8-10 msec to reach the brain (Kemp et al., 1973), but a visual stimulus takes 20-40 msec (Marshall et al., 1943). Reaction time to touch is intermediate, at 155 msec (Robinson, E. S. 1934. Work of the integrated organism. In C. Murchison (Ed.), Handbook of General Experimental Psychology, Clark University Press, Worcester, MA.). Differences in reaction time between these types of stimuli persist whether the subject is asked to make a simple response or a complex response (Sanders, 1998, p. 114). Saville et al. (2012) found that people who had variable reaction times to a visual stimulus also had variable reaction times to an auditory stimulus."