Measures of Individual Differences in Taste and Creaminess Perception
Open Access
- 3 May 2008
- journal article
- research article
- Published by Oxford University Press (OUP) in Chemical Senses
- Vol. 33 (6), 493-501
- https://doi.org/10.1093/chemse/bjn016
Abstract
Previous reports that the sensitivity to the bitter tasting substance 6-n-propylthiouracil (PROP) is related to the sensitivity to other tastes, to chemical irritants, and to fats and oils have led to adoption of PROP as a measure of general oral sensitivity and as a predictor of dietary habits that could impact health. The results, however, have not been consistent. It was recently discovered that the ability to perceive “thermal taste” (i.e., sweetness from thermal stimulation alone) was associated with higher responsiveness to 4 prototypical taste stimuli but not to PROP. This finding implied that individual differences in taste perception are determined in large part by factors other than those related to genetic expression of the PROP receptor. The present study followed up this observation by comparing individual differences in perception of 4 prototypical taste stimuli (sucrose, NaCl, citric acid, and quinine) and PROP under conditions that also enabled assessment of the reliability of individual intensity ratings of taste. Creaminess ratings of 3 milk products that had different fat contents were also collected to investigate further the relationship between taste and oral somatosensory perception. The results showed that intensity ratings across 2 trials were significantly correlated for all 5 taste stimuli and that averaging across replicates led to significant correlations among the 4 prototypical stimuli. In contrast, the bitterness of PROP was correlated only with the bitterness of quinine. None of the taste stimuli, including PROP, was significantly correlated with ratings of creaminess. These results imply 1) that with the exception of PROP, as few as 2 intensity ratings of common taste stimuli can reveal individual differences in overall taste perception and 2) that any relationship between taste and oral sensation is too weak to be detected under the same conditions. Accordingly, the results support other evidence that the genetic factors which determine the ability to perceive PROP do not play a major role in overall taste and oral somatosensory perception.This publication has 58 references indexed in Scilit:
- Gustatory Expression Pattern of the Human TAS2R Bitter Receptor Gene Family Reveals a Heterogenous Population of Bitter Responsive Taste Receptor CellsJournal of Neuroscience, 2007
- Genetics of individual differences in bitter taste perception: lessons from the PTC geneClinical Genetics, 2004
- Labeled scales (e.g., category, Likert, VAS) and invalid across-group comparisons: what we have learned from genetic variation in tasteFood Quality and Preference, 2003
- Psychophysical Measurement of 6‐n‐Propylthiouracil (PROP) Taste PerceptionaAnnals of the New York Academy of Sciences, 1998
- Development of fungiform papillae, taste buds, and their innervation in the hamsterJournal of Comparative Neurology, 1994
- The biological basis of food perception and acceptanceFood Quality and Preference, 1993
- Early development and innervation of taste bud‐bearing papillae on the rat tongueJournal of Comparative Neurology, 1991
- Reliability of magnitude matchingPerception & Psychophysics, 1991
- Reliability of psychophysical measures of gustatory functionPerception & Psychophysics, 1988
- Quinine Dimorphism: A Cardinal Determinant of Taste SensitivityNature, 1963