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The Measurement of Sensation$
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Donald Laming

Print publication date: 1997

Print ISBN-13: 9780198523420

Published to Oxford Scholarship Online: January 2008

DOI: 10.1093/acprof:oso/9780198523420.001.0001

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Scaling sensation

Scaling sensation

Chapter:
(p.87) 7 Scaling sensation
Source:
The Measurement of Sensation
Author(s):

Donald Laming

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198523420.003.0007

If magnitude estimates are definitive measures of sensation, then the same power law should apply not only to the estimation of individual sensations, but to sums and differences as well. The experimental evidence in this chapter says ‘Not so’. A variety of ideas have been proposed in attempts to save the role of magnitude estimates as measures of sensation. These include non-extensive ratio-scale measurement, attributing a subjective value to number itself, and a two-stage model for the judgment of the combined sensation of pairs of stimuli presented both simultaneously and successively (the resultant estimates are different). The idea of the power law as a definitive measure of sensation finally founders on certain situations, in the judgment of loudness and of brightness, in which an increase in total stimulus magnitude leads to a reduction in judged sensation.

Keywords:   combined sensations, definitive measure, power law, ratio-scale measurement, subjective numbers, sums and differences

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