The validity of the equiratio taste mixture model investigated with sorbitol-sucrose mixtures

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Abstract
The equiratio taste mixture model developed and shown to be valid for glucose-fructose mixtures was investigated in order to assess its applicability to two-component mixtures of other sweet substances. A magnitude estimation experiment using the sip and spit procedure determined psychophysical functions for sorbitol, sucrose and three equiratio sorbitol-sucrose mixtures. Mixture functions determined on the basis of the experimental data were very similar to those predicted by the model. The psychophysical functions for sucrose and the sorbitol-sucrose mixtures showed slight downward curvature. As these deviations from the power law affect the predictive validity of the model, potential factors causing these curvatures are discussed.

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