Medical Dictionary

Weber-Fechner law

noun We·ber-Fech·ner law \ ˈweb-ər-ˈfek-nər-, ˈvā-bər-ˈfeḵ-nər- \

medical Definition of Weber-Fechner law

:an approximately accurate generalization in psychology: the intensity of a sensation is proportional to the logarithm of the intensity of the stimulus causing it called also Fechner's law

Biographical Note for weber-fechner law

  • Fechner \ˈfeḵ-nər\, Gustav Theodor (1801–1887), German physicist and psychologist. Fechner was one of the founders of the science of psychophysics. He brought out a fundamental work in this field in 1860 which established his lasting importance in psychology. Fechner also developed experimental procedures for measuring sensations in relation to the physical magnitude of stimuli. In particular he formulated an equation to express Weber's theory of the just noticeable difference. Subsequent research has revealed that the equation is applicable within the middle range of stimulus intensity and then is only approximately true.

  • Seen and Heard

    What made you want to look up Weber-Fechner law? Please tell us where you read or heard it (including the quote, if possible).

    Love words? Need even more definitions?

    Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

    WORD OF THE DAY

    to curse or denounce

    Get Word of the Day daily email!

    Love words? Need even more definitions?

    Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!