20. If you are having trouble solving homework problems, should you sleep on it and try again in the morning? Huber et al. (2004) asked 10 par- ticipants to perform a complex spatial learning task on the computer just before going to sleep. EEG recordings were then taken of the electrical activity of brain cells during their sleep. The magnitude of the increase in their ""slow-wave"
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To do this, we can use the Pearson correlation coefficient formula: $r = \frac{\sum_{i=1}^{n}(x_i - \bar{x})(y_i - \bar{y})}{\sqrt{\sum_{i=1}^{n}(x_i - \bar{x})^2}\sqrt{\sum_{i=1}^{n}(y_i - \bar{y})^2}}$ Show more…
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Research has shown that losing even one night's sleep can have a significant effect on performance of complex tasks, such as problem solving (Linde & Bergstroem, 1992). To demonstrate this phenomenon, a sample of n = 25 college students was given a problem-solving task at noon on one day and again at noon on the following day. The students were not permitted any sleep between the two tests. For each student, the difference between the first and second score was recorded. For this sample, the students averaged M_D = 4.7 points better on the first test with a variance of s^2 = 64 for the difference scores. a. Do the data indicate a significant change in problem-solving ability? Use a two-tailed test with ̑ = .05.
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Research has shown that losing even one night's sleep can have a significant effect on performance of complex tasks, such as problem solving (Linde& Bergstroem,1992). To demonstrate this phenomenon, a sample of n : 25 college students was given a problem-solving task at noon on one day and again at noon on the following day. The students were not permitted any sleep inbetween the two tests. For each student, the difference between the first and second score was recorded. For this sample, the students averaged M, : 4.7 points better on the first test with a variance of s2 : 64 for the difference scores. a. Do the data indicate a signficant change in problem-solving ability? Use a two-tained test with a: .05"
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