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