biology - reaction time

Question 1

how to investigate how practice affects reaction time in humans?

Answer 1

• this requires 2 people. One person person places the forearm of their non-dominant hand on the table, with their hand just hanging off the edge
• one partner should hold the ruler between the fingers of the other partner, at the 0cm mark
• the partner holding the ruler drops it without warning, and the other has to catch it as quickly as possible
• record the number level after the ruler has been caught, repeat 5 times
• find reaction times using a conversion table

Question 2

what else cold be investigated using this practical?

Answer 2

• the effect of caffeine on reaction time
• the effect of exercise/tiredness on reaction time

Question 3

what safety precautions need to be taken during this practical?

Answer 3

avoid injury from falling ruler