See Also: Weber-Fechner law(medicine)
Fechner-Weber law(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Fechner's law(dictionary)
Fechner, Gustav(medicine)
Fechner's Paradox(health)
Fechner, Gustav Theodor(encyclopedia)
Medicine Lodge Memorial Hospital- Medicine Lodge(health)
Weber's law(medicine)
Weber(medicine)

Fechner-Weber law (medicine)


Fechner-Weber law -->
Weber-Fechner law


The intensity of a sensation varies by a series of equal increments (arithmetically) as the strength of the stimulus is increased geometrically; if a series of stimuli is applied and so adjusted in strength that each stimulus causes a just perceptible change in intensity of the sensation, then the strength of each stimulus differs from the preceding one by a constant fraction; thus, if a just perceptible change in a visual sensation is produced by the addition of 1 candle to an original illumination of 100 candles, 10 candles will be required to produce any change in sensation when the original illumination was one of 1000 candles.

Synonym: Fechner-Weber law, Weber's law.