Editing Gustav Fechner (section)

{{short description|German experimental psychologist, physicist, and philosopher (1801–1887)}}
{{Infobox scientist
| name              = Gustav Fechner
| image             = Gustav Fechner.jpg
| caption           =
| birth_name        = Gustav Theodor Fechner
| birth_date        = {{birth date|1801|4|19|df=y}}
| birth_place       = [[Żarki Wielkie|Groß Särchen]] (near [[Bad Muskau|Muskau]]), [[Electorate of Saxony|Saxony]], [[Holy Roman Empire]]
| death_date        = {{death date and age|1887|11|18|1801|4|19|df=y}}
| death_place       = [[Leipzig]], [[Kingdom of Saxony|Saxony]], [[German Empire]]
| residence         = 
| citizenship       = 
| nationality       = German
| education         = {{Interlanguage link|Medizinische Akademie Carl Gustav Carus|de}}<br>[[Leipzig University]] (PhD, 1835)
| thesis_title      = De variis intensitatem vis Galvanicae metiendi methodis (Various methods of measuring Galvanic force intensity)
| thesis_url        = https://digital.slub-dresden.de/werkansicht/dlf/20235/1/
| thesis_year       = 1835
| doctoral_advisor  = 
| doctoral_students = 
| notable_students  = [[Hermann Lotze]]
| known_for         = [[Weber–Fechner law]]
| field             = [[Experimental psychology]]
| work_institutions = [[Leipzig University]] 
}}

'''Gustav Theodor Fechner''' ({{IPAc-en|ˈ|f|ɛ|x|n|ər}};<ref>{{Cite Dictionary.com|Fechner}}</ref> {{IPA|de|ˈfɛçnɐ|lang}}; 19 April 1801 – 18 November 1887)<ref>{{cite web|url=https://www.britannica.com/biography/Gustav-Fechner|title=Gustav Fechner - German psychologist and physicist|website=Encyclopedia Britannica|access-date=18 January 2019}}</ref> 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 [[Sense|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>{{cite book |last=Fancher |first=R. E. |year=1996 |title=Pioneers of Psychology |edition=3rd |location=New York |publisher=W. W. Norton & Company |isbn=0-393-96994-0 }}</ref><ref>{{Citation
|pmid = 15171801
|last=Sheynin
|first=Oscar
|publication-date=May 2004
|year=2004
|title=Fechner as a statistician.
|volume=57
|issue=Pt 1
|periodical=[[British Journal of Mathematical and Statistical Psychology]]
|pages=53–72
|doi = 10.1348/000711004849196
}}</ref>