UNDER the title of psycho-physiology may be comprised those investigations in psychology which have explicit or tacit reference to the concomitant physiological processes, and which are characterised by the application of the experimental method. The boundaries of the subject are somewhat ill-defined, since it shades off into physiology on the one hand, and into introspective psychology on the other. I shall endeavour in this article to indicate the scope of such experimental investigations.
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Journal of the History of Biology (2017)