Investigating reaction time required practical

Question 1

What are the steps to this experiment?

Answer 1

1. hold a ruler at 0cm
2. let go without warning
3. the person being tested should try to catch the ruler as quickly as they can
4. record the number that the person caught the ruler at
5. repeat several times until a mean can be calculated
6. now give the same person caffiene
7. after 10 mins, repeat experiment
8. make sure the ruler is being dropped from the same distance, and make sure that the person being tested is catching the ruler with the same hand

Question 2

What happens to reaction times when the volunteer is given caffeine?

Answer 2

Their reaction time is faster

Question 3

Each time the scientist repeated the test he got similar results. What does this say about the scientists results?

Answer 3

The results are repeatable

Question 4

Give two variables that the scientist should have kept the same?

Answer 4

Use the same amount of caffeine each time the experiment is carried out and the time after being given caffeine should stay the same

Question 5

what are independent variables?

Answer 5

A variable you will change (e.g. concentration)

Question 6

what are dependent variables?

Answer 6

The variable you measure (temperature)