Scripture, E. W. (1897). Standards of energy. In E. W. Scripture, The contemporary science series. The new psychology (pp. 209-214). London, England: Walter Scott Publishing Co.
http://dx.doi.org/10.1037/12905-014
This chapter provides an overview of standards of energy. The ability to do work is called energy. One of the factors of energy is its intensity. In this chapter we shall especially consider the intensity-factor, this being what is meant by the usual expressions: intensity of effort, intensity of sensation. The capacity-factor has been subjected to little investigation. Energy is known to us under various forms, of which the most prominent are energy of movement, energy of space, energy of warmth, and energy of light. Is the standard of energy a physical or a psychological one? Just as in the case of time, the establishment of standards of energy is made on the basis of our mental experience. It is argued that the standard of energy is both a physical and a psychological one. It is physical because it is ultimately established by instrumental means; it is psychological because no step of the process goes outside of our experience. (PsycINFO Database Record (c) 2016 APA, all rights reserved)