Stanley Smith Stevens ( November 4 , 1906 -- January 18 , 1973 ) was an American psychologist who founded Harvard 's Psycho-Acoustic Laboratory , studying psychoacoustics , and he is credited with the introduction of Stevens ' power law .
Stanley Smith Stevens ( 4 November 1906 -- 18 January 1973 ) was an American psychologist . He founded Harvard 's Psycho-Acoustic Laboratory and introduced Stevens ' power law .