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The psychologic tests now used in determining the ability of candidates for the aviation service to withstand altitude have been developed for use under the practical conditions of the Henderson rebreathing apparatus, in which the rate of oxygen decrease is rapid. The statements made here with regard to the course of the phenomena apply only to conditions of brief ascents, and do not necessarily hold in all particulars for cases in which the aviator is kept at corresponding altitudes for long periods of time.
The effects of oxygen insufficiency on the physiologic process were in the beginning of our work studied empirically, with the least possible hypothetic guidance. Our results square distinctly with the conception of psychologic processes as integrative, that is, as dependent on the working together of the central nervous system as a whole rather than on the action of any specific parts of the system.
DUNLAP K. IV. PSYCHOLOGIC OBSERVATIONS AND METHODS. JAMA. 1918;71(17):1392–1393. doi:https://doi.org/10.1001/jama.1918.26020430014009c
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