1) Which of these are valid errors in the experiment? (More than one correct answer) a) Telling the person when you are going to drop it b) Catching the ruler c) Misreading the hand position d) Distractions 2) Which of these can speed up reaction time? (more than one correct answer) a) Being sleepy b) Caffeine c) Being distracted d) Practicing a skill 3) How is the mean calculated? a) Divide by 3 b) Add the numbers up then divide by the number you have c) Lowest - Highest d) Most common 4) How is the range calculated? a) Divide by 3 b) Add the numbers up then divide by the number you have c) The difference between Lowest - Highest d) Most common 5) What was the independent (I change) variable in the ruler drop experiment? a) Distance ruler caught b) Times practiced c) Making sure the ruler is in the same position at the start d) Not warning the person before dropping 6) What was the dependent (results) variable in the ruler drop experiment? a) Distance ruler caught b) Person doing the drop c) Making sure the ruler is in the same position at the start d) Not warning the person before dropping 7) Which of these isn't a control variable in the ruler drop experiment? a) Using the same ruler b) Calculating reaction time c) Making sure the ruler is in the same position at the start d) Not warning the person before dropping 8) What is 126mm in cm? a) 1260 b) 1.26 c) 12.6 d) 0.126 9) How is the uncertainty calculated? a) Range / 2 b) Add the numbers up then divide by the number you have c) The difference between Lowest - Highest d) Most common 10) Which of these are advantages of improving reaction time? Write your own answers... a) A b) B  c) C  d)  D

Reaction Time

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