. Bulletin of the University of Wisconsin. Science. 166 BULLETIN OF THE UNIVERSITY OP WISCONSIN. that one whose sleep is not undisturbed will manifest the out- come in a lessened amount of vigor which may be utilized in in- tellectual work. Some of our students preparing for examinations deprive themselves of sleep altogether for three or four nights. That this is a serious mistake hardly needs argument, it seems to me. It is probably not only a waste of energy in the long run, but really defeats the purpose for which the individual remains awake; for when the mind has been driven twenty-four
. Bulletin of the University of Wisconsin. Science. 166 BULLETIN OF THE UNIVERSITY OP WISCONSIN. that one whose sleep is not undisturbed will manifest the out- come in a lessened amount of vigor which may be utilized in in- tellectual work. Some of our students preparing for examinations deprive themselves of sleep altogether for three or four nights. That this is a serious mistake hardly needs argument, it seems to me. It is probably not only a waste of energy in the long run, but really defeats the purpose for which the individual remains awake; for when the mind has been driven twenty-four hours without relaxation, it is not in a condition to do vigorous think- ing; and if the strain be kept up throughout an entire exami- nation week, the intellect must suffer in all its operations,—per- ception, memory, reason, and the rest. Some experiments have been made by Patrick1 respecting the effect of prolonged absence of sleep upon muscular and intellectual capabilities, and these should be of interest to those students who study all night pre- paratory to an examination. The charts which follow indicate the increasing uncertainty in and diminution of various mental and physical powers as the period of constant waking life length- ens. IPM. Fig. 13.—The ordinates show the number of seconds required to add a given number of figures. The abscissae show the progress of the hours during the wak- ing period. The last interval, however, representing the period of sleep following. (Patrick.) *At the University of Iowa. See Studies from the Psychological Laboratory of the University of Iowa, Vol. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University of Wisconsin. Madison, Wis. : The University
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