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GUSTAV THEODOR See also:FECHNER (1801-1887) , See also:German experimental psychologist, was See also:born on the 19th of See also:April 18or at See also:Gross-Sarchen, near Muskau, in See also:Lower See also:Lusatia, where his See also:father was pastor . He was educated at See also:Sorau and See also:Dresden and at the university of See also:Leipzig, in which See also:city he spent the See also:rest of his See also:life . In 1834 he was appointed See also:professor of physics, but in 1839 contracted an See also:affection of the eyes while studying the phenomena of See also:colour and See also:vision, and, after much suffering, resigned . Subsequently recovering, he turned to the study of mind and the relations between See also:body and mind, giving public lectures on the subjects of which his books treat . He died at Leipzig on the 18th of See also:November 1887 . Among his See also:works may be mentioned: Das Biichlein vont Leben nach dem Tode (1836, 5th ed., 1903), which has been translated into See also:English; Nanna, See also:oder i ber das Seelenleben der Pflanzen (1848, 3rd ed., 1903); Zendavesta, oder ' The liqueur is said to have been manufactured by the See also:Benedictine monks of the See also:abbey as far back as 151o; since the Revolution it has been produced commercially by a See also:secular See also:company . The See also:familiar See also:legend D . O . M . (Deo Optimo Maximo) on the bottles preserves the memory of its See also:original makers . caber See also:die Dinge See also:des $immels and des Jenseits (1851, 2nd ed. by Lasswitz, Igor); Ober die physikalische and philosophische Atomenlehre (1853, 2nd ed., 1864); Elemente der Psychophysik (x86o, 2nd ed., 1889); Vorschule der Asthetik (1876, 2nd ed., 1898); Die Tagesansicht gegeniiber der Nachtansicht (1879) . He also published chemical and See also:physical papers, and translated chemical'works by J . B . See also:Biot and L . J . See also:Thenard from the See also:French . A different but essential See also:side' of his See also:character is seen in his poems and humorous pieces, such as the Vergleichende Anatomie der See also:Engel (1825), written under the See also:pseudonym of " Dr Mises." See also:Fechner's See also:epoch-making See also:work was his Elemente der Psychophysik (186o) . He starts from the Spinozistic thought that bodily facts and conscious facts, though not reducible one to the other, are different sides of one reality . His originality lies in trying to discover an exact mathematical relation between them . The most famous outcome of his inquiries is the See also:law known as See also:Weber's or Fechner's law which may be expressed as follows:—" In See also:order that the intensity of a sensation may increase in arithmetical progression, the stimulus must increase in geometrical progression." Though holding See also:good within certain limits only, the law has been found immensely useful . Unfortunately, from the tenable theory that the intensity of a sensation increases by definite additions of stimulus, Fechner was led on to postulate a unit of sensation, so that any sensation s might be regarded as composed of n See also:units . Sensations, he argued, -thus being representable by See also:numbers, See also:psychology may become an " exact " See also:science, susceptible of mathematical treatment . His See also:general See also:formula for getting at the number of units in any sensation is s=c See also:log R, where s stands for the sensation, R for the stimulus numerically estimated, and c for a See also:constant that must be separately determined by experiment in each particular order of sensibility . This reasoning of Fechner's has given rise to a See also:great See also:mass of controversy, but the fundamental See also:mistake in it is See also:simple .
Though stimuli are composite, sensations are not
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" Every sensation," says Professor See also: He was remotely a See also:disciple of See also:Schelling, learnt much from See also:Herbart and See also:Weisse, and decidedly rejected See also:Hegel and the monadism of See also:Lotze . See W . Wundt, G . Th . Fechner (Leipzig, 1901) ; A . Elsas, " Zum Andenken G . Th . Fechners," in Grenzbote, 1888; J . E . Kuntze, G . Th . Fechner (Leipzig, 1892) ; Karl Lasswitz, G . Th . Fechner (See also:Stuttgart, 1896 and 19o2); E . B . Titchener, Experimental Psychology (New See also:York, 19o5); G . F . Stout, See also:Manual of Psychology (1898), bk. ii. ch. vii.; R . Falckenberg, Hist. of Mod . Phil . (Eng. trans., 1895), pp . 6or See also:foil.; H . See also:Hoffding, His& of Mod . Phil . (Eng. trans., r900), vol. ii. pp . 524 foil.; Liebe, Fechners Metaphysik, See also:im Umr!ss dargestellt (1903) . (H . |
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