This article is about a psychologist. For a ship, see SS Stevens.
Stanley Smith Stevens (November 4, 1906 – January 18, 1973)[1] was an American psychologist who founded Harvard's Psycho-Acoustic Laboratory, studying psychoacoustics,[2] and he is credited with the introduction of Stevens's power law. Stevens authored a milestone textbook, the 1400+ page Handbook of Experimental Psychology (1951). He was also one of the founding organizers of the Psychonomic Society. In 1946 he introduced a theory of levels of measurement widely used by scientists but whose use in some areas of statistics has been criticized.[3] In addition, Stevens played a key role in the development of the use of operational definitions in psychology.[4]