Hedonic Judgments of Chemical Compounds Are Correlated with Molecular SizeReport as inadecuate




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Department of Applied Statistics, Universidad Polit├ęcnica de Valencia, Camino de Vera s-n, 46022 Valencia, Spain





Abstract Different psychophysical works have reported that, when a wide range of odors is assessed, the hedonic dimension is the most salient. Hence, pleasantness is the most basic attribute of odor perception. Recent studies suggest that the molecular size of a given odorant is positively correlated with its hedonic character. This correlation was confirmed in the present study, but further basic molecular features affecting pleasantness were identified by means of multiple linear regression for the compounds contained in five chemical sets. For three of them, hedonic judgments are available in the literature. For a further two chemical sets, hedonic scores were estimated from odor character descriptions based on numerical profiles. Generally speaking, fairly similar equations were obtained for the prediction of hedonic judgments in the five chemical sets, with R2 values ranging from 0.46 to 0.71. The results suggest that larger molecules containing oxygen are more likely to be perceived as pleasant, while the opposite applies to carboxylic acids and sulfur compounds. View Full-Text

Keywords: VOC; olfaction; pleasantness; hedonic valence; odor character descriptor; numerical odor profile VOC; olfaction; pleasantness; hedonic valence; odor character descriptor; numerical odor profile





Author: Manuel Zarzo

Source: http://mdpi.com/



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