-ˈfek]nə(r)-, -ḵ] noun
Usage: usually capitalized W&F
Etymology: after Ernst H. Weber died 1878 German physiologist & anatomist, & Gustav T. Fechner died 1887 German psychologist
: 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