By Joshua A Solomon
This assortment celebrates the a hundred and fiftieth anniversary of Fechner's booklet on Psychophysics (originally released ten years after his epiphany of Oct. 22, 1850). subject matters comprise sleek checks of the issues with which Fechner wrestled. additionally integrated are extra basic discussions of psychophysical technique, psychophysical conception, and the way those issues will be beneficial in components no longer in most cases linked to psychophysics. moreover, those works supply an entree into Fechner's principles, that is maybe extra available than his seminal paintings itself.
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Extra info for Fechner's Legacy in Psychology: 150 Years of Elementary Psychophysics
1876). An attempt to interpret Fechner’s Law, Mind 1, 452–466. Weber, E. H. (1834, 1996). De tactu. Annotationes anatomicae et physiologicae. Koehler, Leipzig (1834). Transl. H. E. Ross and D. J. Murray (Eds) (1996). E. H. Weber on the Tactile Senses, 2nd edn. Erlbaum (UK), Taylor and Francis, Hove, UK. Weinstein, S. (1968). Intensive and extensive aspects of tactile sensitivity as a function of body part, sex, and laterality, in: The Skin Senses, D. R. ), pp. 195–222. , USA. Wilson, H. R. and Humanski, R.
This appears to be evidence against the Parallel Law. Fechner’s elusive parallel law 35 5. Adaptation and Contrast Effects in Other Visual Tasks There are many examples of the effects of adaptation on discrimination in various sense modalities. We describe a few recent visual studies to illustrate the ubiquity of the phenomena. Visual motion was studied by Clifford and Wenderoth (1999), who showed that after adaptation to a moving pattern perceived speed decreased, and discrimination of speed differences improved near the adapted level.
1970). Signal recognition as influenced by information feedback, J. Mathemat. Psychol. 7, 259–274. Treisman, M. and Leshowitz, B. (1969). The effects of duration, area, and background intensity of the visual intensity difference threshold given by the forced-choice procedure: derivations from a statistical decision model for sensory discrimination, Percept. Psychophys. 6, 281–296. Fechner’s Elusive Parallel Law Helen E. Ross 1,∗ and Nicholas J. Wade 2 1 Department of Psychology, University of Stirling, Stirling FK9 4LA, UK 2 School of Psychology, University of Dundee, Dundee DD1 4HN, UK Abstract Weber’s Law states that the differential threshold or just-noticeable-difference (jnd) is proportional to the physical intensity of the stimulus.