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Gustav Theodor Fechner ({{#invoke:IPAc-en|main}}; German: [ˈfɛçnɐ]; April 19, 1801 – November 18, 1887),<ref>[1]</ref> was a German philosopher, physicist and experimental psychologist. An early pioneer in experimental psychology and founder of psychophysics, 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: <math>S = K \ln I</math>, which became known as the Weber–Fechner law.<ref>{{#invoke:citation/CS1|citation |CitationClass=book }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=citation }}</ref>


Gustav Fechner sections
Intro   Early life and scientific career    Contributions    Influence   Family and later life    Works    References    Further reading    External links   

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