Caffeine helps to wake up, adds energy, but does not compensate for the sleep-affected by the organism. The results of the study are published in the journal of the American Psychological Association Journal of Experimental Psychology: Learning, Memory, and Cognition.
Scientists with faculties of psychiatry and psychology of the University of Michigan rated how coffee is coping with the negative influence of lack of sleep for cognitive abilities. They selected 275 volunteers who were broken into two groups: the first spent the night without sleep in the laboratory, the second – calmly slept at home. In the morning and the other was given caffeine capsule or placebo. They were asked to pass a simple test to the concentration of attention and solve a more complex task “on the placement” – it required to perform actions in a certain order without skipping or repeating steps.
“We found that the deprivation of sleep has deteriorated performance when performing both types of tasks, and caffeine helped to successfully fulfill the easier task, but for most participants it has little influenced performance when performing the placement task,” said the head of the study, psychology professor From the laboratory of sleep and training, Dr. Kimberly Fenn (Kimberly Fenn); Her words are given in the university press release.
As noted by the authors of the work, the problem of lack of sleep in the US and other developed countries is very acute. Their study proves that in its solution, it is impossible to rely on the stimulating brain activity the effect of coffee. This drink increases energy, reduces drowsiness and can even improve the mood, but “absolutely does not replace a full night sleep,” Scientists indicate.