Night | Before Deprivation | After Deprivation | Percentage Difference |
Monday | 0.244 | 0.270 | 11.03 |
Tuesday | 0.233 | 0.257 | 10.49 |
Wednesday | 0.259 | 0.276 | 7.415 |
Subjects were asked to press a space bar as soon as three circles displayed on a computer turned from red to green.
Three practice trials were allowed. These were immediately followed by 5 trials. The average of the five reaction times was calculated.
The whole procedure was performed between 13.00 and 14.00 prior to sleep deprivation that night. The procedure was repeated at the same time the following day, after sleep deprivation.
As can be seen from the table above, there was an increase in reaction time after sleep deprivation. The Average increase for each night was within 7 to 11%. The table below shows that each of the three experiments produced significant increases in reaction times.
Night | t value | df | probability 1-tailed |
Monday | 2.667445 | 9 | p less than 0.025 |
Tuesday | 3.481713 | 8 | p less than 0.005 |
Wednesday | 1.97473 | 8 | p less than 0.05 |
Copyright © 1998 Gary Sturt
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