Simple computer tests can also be used to measure reaction time. E.g. the person being tested has to click the mouse (or press a key) as soon as they see a stimulus on the screen, such as a box changing colour
Computers can give more precise reaction time because they remove the possibility of human error from the measurement
Using a computer can also remove the possibilty that the peron can predict when to respond - using the ruler test, the catcher may learn to anticipate the drop by reading the tester's body language
Reaction time is the time it takes to respond to a stimulus. It can be affected by factors such as age, gender, or drugs
