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Reaction Times

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His is the data I collected to prove my first hypothesis which was that I (and most people) work better at different times of day. I predicted that I would get my lowest reaction time during the afternoon because I believe that is the time when people are most alert and their reactions quickest. I also believe that the highest reaction times will be at night when people are feeling sleepy and will have slow reactions.


0.35, 0.28, 1.03, 0.29, 0.22, 0.17, 0.2, 0.19, 0.2, 0.19, 0.16, 0.21,  0.23, 0.21, 0.18, 0.17, 0.16, 0.59, 1.16, 0.28, 0.18, 0.17, 0.18, 0.19, 0.18, 0.21, 0.18, 0.22, 0.2, 0.2, 0.45

I collected this at 17:02 because that was the time; I felt was when I was not too tired and not too awake! I decided that I would show the data I collected for the control first in a steam and leaf diagram and then present it in a line graph.

Data collection


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0.21 0.43 0.26 0.24 0.38 0.03 0.34 0.1 0.22 0. 21 0.34 0.41 0.23 0.34 0.25 0.1 0.23 0.34 0.5 0.26  0.34 0.22 0.47 0.27 0.16 0.94 0.34 0.41 0.28 0.52 0.27 0.34 0.25 0.13


0.35 0.3 0.31 0.16 0.14 0.31 0.34 0.22 0.3 0.01 0.25 0.22 0.26 0.2 0.24 0.43 0.49 0.21 0.17 0.19 0.21 0.38 0.38 0.59 0.2 0.21 0.26 0.03 0.21 0.2


0.23 0.2 0.4 0.2 0.22 0.19 0.23 0.36 0.28 0.25 0.25 0.23 0.23 0.38 0.18 0.32 0.32

0.26 0.22 0.24 0.19

0.23 0.23 0.21 0.19 0.16 0.34 0.42 0.13 0.19 0.65


0. 22 0.30 0.27 0.18 0.18 0.22 0.24 0.25 0.27 0.28 0.34 0.54 0.13 0.26 0.19 0.19 0.56 0.97 0.21 0.24 0.22 0.22 0.05 0.13 0.23 0.84 0.25 0.26 0.32 1.13 1.27

The table above shows data I collected, in chronological order.

 I repeated my experiment 30x for each time frame because I thought that my experiment would not be very accurate because I could not repeat my results on different days, over an over

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I have proved my hypothesis because I have shown that I received my lowest (and fastest) reaction times and my fastest average during the afternoon, like I predicted and also I proved that I received my slowest reaction time and my slowest average during the night , also like I predicted.


This is the same graph again but this shows my performance throughout the day- I have just joined up the other graph so you can see how my performance peaked in the afternoon and slowed down in the night.


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Here's what a teacher thought of this essay

There are some nice ideas in this work but there is a very misleading use of graphs without a horizontal scale. However, some good examples of stem and leaf diagrams even if the keys are wrong. 2 stars

Marked by teacher Mick Macve 18/03/2012

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