112635-01 Fechner, Gustav Theodor.
Elemente der Psychophysik. 2 Bände.
(22 x 14 cm). XIV, 336 S./ XII, 572 S. Moderne Halbleinwandbände im Stil der Zeit.
Leipzig, Breitkopf und Härtel, 1860.
Erste Ausgabe seines Hauptwerkes. - "Fechner founded the science of psychophysics, which applies the laws of mathematical physics to the physiology of sensation. In his 'Elemente der Psychophysik', Fechner placed the methodology of this new science on a sound footing by developing three of its basic methods: the method of limits (just noticeable differences); the method of constant stimuli; and the method of average error. 'His greatest contribution was his creation of a scale of sensation, a scale that measured sensation as something different from the stimulus so that the relation of the magnitude of the stimulus to the magnitude of the consequent sensation could be determined. That determination came to be known as Fechner's law..., the rule that the magnitude of the sensation is proportional to the logarithm of its stimulus [S = C log R]. Theretofore there had been no strictly subjective measurement, and the new scientific psychology, just ready to be founded, hailed this achievement as its warrant and safe-conduct' (Herrnstein & Boring, Sourcebook in the History of Psychology, p. 67)" (Norman). - Stempel auf Titel. Durchgehend gering gebräunt, sonst wohlerhalten. - Garrison-Morton 4972; Norman 771