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Chemical Senses Advance Access published online on June 22, 2006
Chemical Senses, doi:10.1093/chemse/bjl005
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© The Author 2006. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org
Accepted May 31, 2006

Article

Dissociating Pleasantness and Intensity with Quinine Sulfate/Sucrose Mixtures in Taste

Maria G. Veldhuizen 1 *, Anthonie P.A. van Rooden 1, and Jan H.A. Kroeze 2

1 Experimental Psychology, Taste and Smell Laboratory, Helmholtz Research Institute, Utrecht University, Heidelberglaan 2, 3584 CS Utrecht, The Netherlands
2 Experimental Psychology, Taste and Smell Laboratory, Helmholtz Research Institute, Utrecht University, Heidelberglaan 2, 3584 CS Utrecht, The Netherlands; Wageningen Taste and Smell Center, Wageningen University and Research Center, Wageningen, The Netherlands

* To whom correspondence should be addressed.
Maria G. Veldhuizen, E-mail: m.veldhuizen{at}fss.uu.nl


  Abstract

Independent experimental manipulation of subjective intensity and hedonic tone is required if one wants to study their separate effects on brain activity and behavior. This is problematic because hedonic tone and subjective intensity are related, leading to a pleasantness change each time the stimulus intensity is altered. In the present study, a solution to this problem was explored by combining a pleasant-tasting substance (sucrose) and a bad-tasting substance (quinine sulfate) into a number of different isointense mixtures. Here we show that subjective intensity as well as pleasantness can be accurately predicted, particularly in midrange, only if one corrects for mixture suppression.

Keywords: binary mixtures; human; psychohedonic; taste hedonics.
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