reaction time

• What position should person 1 be in during the experiment?

  Upright on a stool
• How does person 2 initiate the reaction time test?

  By dropping the ruler at a random time
• What should person 2 record during the test?

  The measurement at the top of person one's thumb
• Why is it important for person 1 to have a short rest after the test?

  To avoid fatigue affecting the results
• What is the independent variable in this experiment?

  The person having their reaction time tested
• What is the dependent variable in this experiment?

  The reaction time measured
• What are the control variables in the reaction time experiment?

  • Distance between thumb and first finger
  • Measurement taken at the top of the thumb
  • Consistent room conditions (lighting, noise)
• What could happen if control variables change?

  It could affect the reaction time results
• What are some other independent variables that could be investigated?

  • Effect of practice on reaction time
  • Hand used to catch the ruler
  • Impact of chemicals like caffeine
• How could practice affect reaction time?

  Reaction time may become shorter with practice
• How can the dominant hand affect reaction time?

  Dominant hand may have a shorter reaction time
• What is a method to test the effect of caffeine on reaction time?

  Compare reaction time after drinking cola
• What should be checked before giving subjects caffeine?

  Medical issues that could be affected
• Where should the test be conducted?

  In a lab without hazardous chemicals