Reaction time

• What is reaction time?

  The time it takes to respond to a stimulus
• Why must we rest our arm flat on the table when catching the ruler?

  To reduce random error from arm movement
• Why must the zero end of the ruler be just above your finger?

  To ensure the ruler drops from the same point
• Why is it important that the ruler is dropped without warning?

  To prevent anticipation of the drop
• Why is it important to take a short rest before repeating the experiment?

  To avoid anticipating the drop
• What is wrong with saying a person has a faster reaction time?

  Time cannot go faster; it's shorter