Mental fatigue : a comprehensive exposition of the nature of mental fatigue, of the methods of its measurement and of their results, with special reference to the problems of instruction / by Dr. Max Offner tr. from the German by Guy Montrose Whipple.
- Offner, Max, 1864-1932.
- Date:
- 1911
Licence: Public Domain Mark
Credit: Mental fatigue : a comprehensive exposition of the nature of mental fatigue, of the methods of its measurement and of their results, with special reference to the problems of instruction / by Dr. Max Offner tr. from the German by Guy Montrose Whipple. Source: Wellcome Collection.
Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.
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![yet unexplained, a considerable diminution of the spatial limen. These compasses and like instru- ments, such as Eulenberg, Ziehen, Spearman, Eb- binghaus, Binet, Abelson [Jastrow, Titchener] and others have contrived for the same purpose, are called esthesiometers, and, accordingly, the spatial limen or the compass-point method is also termed the esthesiometric method. Griesbach's subjects were pupils in the Gymna- sium and the Oherrealschule* (technical high school) at Miihlhausen, as well as teachers in training, and, in his later tests, teachers, soldiers and other adults as well. He secured his measurements from several regions of the body, e. g., the forehead, the cheek- bone, the tip of the nose, the mucous membrane of the lower lip, the ball of the right thumb and the tip of the right forefinger. As he found that, in general, the sensitivity of these regions varied in like manner, he finally confined himself to the testing of a few re- gions—at times, indeed, to a single region, particu- larly to the cheek-bone, as being the most sensitive place.t Nevertheless, this correspondence of the different regions held true only in a general way, as is shown especially by the comparison of measurements taken on symmetrical zones of the two halves of the body, and these, too, are neither structurally nor func- tionally absolutely alike. After more abstract ac- *0n the technical terms descriptive of the German school sys- tem, consult Appendix II.—Translator. fSchuyten of Antwerp prefers to test that part of the cheek that lies vertically under the outer angle of the eye at the level of the tip of the nose, and, with good reason, recommends that measure- ments be taken on both sides of the face.](https://iiif.wellcomecollection.org/image/b21211632_0045.jp2/full/800%2C/0/default.jpg)
