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Retrospective, and prospective considerations on psychophysical measurement emanating from time perception studies
Stockholm University, Faculty of Social Sciences, Department of Psychology.
2009 (English)In: Fechner Day 2009: Proceedings of the 25th Annual Meeting of the International Society for Psychophysics / [ed] M.A. Elliott, S. Antonijevic, S. Berthaud, P. Mulcahy, B. Bargary, C. Martyn, & H. Schmidt, Galway, Irland: International Society for Psychophysics , 2009, 55-58 p.Conference paper (Other academic)
Abstract [en]

Retrospective. What kind of invariances should we look for, and where? Can we catch the lack of invariance by parameter values? The empirically obtained linearity between standard and set ratio in ratio setting in general and in duration reproduction in particular leads uniquely to a power function describing the relation between stimulus and sensation-an example of invariance. Applying the parallel-clock model (H. Eisler, 1975) makes the determination of the parameter values possible without the observers having to use numerals. The parameters should not only be regarded as fitting constants; they carry information about time-structuring behavior, as in, e.g., group differences, experimental conditions, and individual differences-which otherwise could be seen as simply lack of invariance (H. Eisler, Eisler, and Hellström, 2008).

Prospective. (1) Nonlinear psychophysical dynamics deals not only with the end result of a sensory process but also attempts to follow the building-up of a sensation (over time). (2) A close connection between brain processes and psychophysical variables seems imminent. Empirically obtained breaks in the psychophysical function for duration are in line with Thatcher and John's (1977) assumption that time experience is built up from iterative neural loops (see Eisler, 1996). Furthermore, a recent discovery of number neurons (Dehaene, 2003, Nieder & Miller, 2003) promises fast advances in psychophysics.

Place, publisher, year, edition, pages
Galway, Irland: International Society for Psychophysics , 2009. 55-58 p.
Keyword [en]
brain, neural loops, perceptual invariance, psychophysical invariance, sensory processes
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URN: urn:nbn:se:su:diva-35004OAI: diva2:286107
Fechner Day 2009
Available from: 2010-01-13 Created: 2010-01-13

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