Reaction Time

• What is the purpose of this practical?

  To measure reaction time
• Person 1 sits on a stool with good upright
• Person 1 places the forearm of their dominant arm across the table with their hand overhanging the edge.
• If a person is right-handed, which arm is their dominant arm?

  Right arm
• The zero centimeter mark of the ruler should be between person one's thumb and first finger
• The dependent variable in this experiment is the reaction
• The starting distance between the thumb and finger should be kept constant in this experiment.
• What could happen if control variables are not maintained in this experiment?

  Affect reaction time
• One additional independent variable to investigate is the effect of practice
• What might you expect to happen to reaction time with increased practice?

  Become shorter
• Reaction time is likely shorter with the dominant hand compared to the non-dominant hand.
• To investigate the effect of caffeine, the test subject drinks a measured amount of cola
• Why is it necessary to use a caffeine-free cola when investigating the effect of caffeine on reaction time?

  To isolate caffeine's effect
• Participants should be checked for medical conditions affected by caffeine before the experiment.
• In what type of environment should this experiment be conducted?

  A lab