Reaction time is a simple behavior that includes the reception of sensory input, central processing of this information, and output of a programmed behavior.
In this experiment participants reacted to an auditory, tactile, or visual cue by grasping a falling ruler with the dominant or nondominant hand.
The data were collected in a nonstandard environment by untrained students and therefore should not be construed as accurate. It was just a fun exercise to learn about a simple behavior, flow of information in the nervous system, and research methods.