Gustav Theodor Fechner (German psychologist, philosopher and physicist) Add a review

Gustav Theodor Fechner (; German: [ˈfɛçnɐ]; 19 April 1801 – 18 November 1887) was a German physicist, philosopher, and experimental psychologist. A pioneer in experimental psychology and founder of psychophysics (techniques for measuring the mind), he inspired many 20th-century scientists and philosophers. He is also credited with demonstrating the non-linear relationship between psychological sensation and the physical intensity of a stimulus via the formula: ${\displaystyle S=K\ln I}\{\backslash displaystyle\; S=K\backslash ln\; I\}$, which became known as the Weber–Fechner law.