Image Credit

Description:

The definition of reaction time is presented through a timeline. First, a blank screen is presented to the user. This is followed by flashing a red screen (when measurement of the reaction time begins). In the next sequence, this red screen is detected by the visual system. An image of the brain is then shown given a command to the arm and hand muscles to move. The final tick in the timeline shows a hand pushing a button (when measurement of the reaction time ends).

Source:

Kristin Strong, Science Buddies

License:

Science Buddies