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NTC 2680-2013 Sensory analysis

Sensory analysis. Methodology paired comparison test: This standard describes a procedure to determine whether there is a perceptible sensory difference or similarity between samples of two products with respect to the intensity of a sensory attribute. This test is also known as the directional difference test or 2-AFC test (forced choice alternative test). In fact, the paired comparison test is a forced choice test between two alternatives.     

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Norma Técnica