Question on ipm: A case study on lemon juice

Abstract : In food product development, using consumers to obtain ideal products is becoming more frequent in recent years. Despite being an economical way of optimizing products, relying on consumers is, however, not yet widely accepted in the sensory community. The main objectives of this study were to evaluate (1) whether the stability of ideal intensities and ideal products could be improved by providing a frame of references when consumers perform the Ideal Profile Method (IPM) and (2) the effect of the order of the questions on consumers‘ responses. In the present study, sixty participants conducted two tasks: (1) rating the perceived and ideal intensities of attributes and (2) reporting the overall liking. They were randomly divided into four groups. Group G1 and G2 used references in rating intensity, whereas group G3 and G4 did not. Concerning the order of question, group G1 and G3 answered the overall liking question before rating the intensity, whereas G2 and G4 followed the inverse order. The experimental design included six lemon juice samples, and four attributes (pulp, lemon odor, sweetness, and sourness). A three-way ANOVA was conducted on the ideal intensities of attributes and overall liking with reference and order as a between-subject factor and product as a within-subject factor. Results showed that providing a frame of references improved the stability of the ideal attribute pulp, but not of the other ideal attributes. Besides, the order effect was without influence on overall liking. For ideal intensities, an order effect was observed on the ideal attribute pulp between groups G3 and G4 (without reference), and was not observed between groups G1 and G2 (with references). Several possible modifications to improve the IPM are discussed.
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Conference papers
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Submitted on : Thursday, July 11, 2019 - 3:05:17 PM
Last modification on : Wednesday, November 20, 2019 - 9:44:06 AM

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  • HAL Id : hal-02180530, version 1

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M.T. Le, H.D. Nguyen, Gaëlle Roudaut, Dominique Valentin. Question on ipm: A case study on lemon juice. SPISE 2012 - 3rd International Symposium: Integration Sensory Evaluation into Product Development: an Asian Perspective, Jul 2012, Ho Chi Minh City, Vietnam. ⟨hal-02180530⟩

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