Journal Article: Sensory discrimination testing and consumer relevance (2015)

Abstract: In order to ensure consistency in the decision making process over time, a discrimination testing program must take into account all of five elements: The testing protocol, the sample size, the Type I error (α), the Type II error (β) (power = 1 - β) and a measure of the threshold above which...

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Journal Article: A Thurstonian model for the degree of difference protocol (2015)

Abstract: In the degree of difference methodology (DOD), subjects are presented with pairs of samples, either identical or different, and must indicate how different the samples are using a t-point category rating scale. In this article, the Thurstonian model for the DOD assuming independent assessments is derived. The model permits the estimation of the...

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Journal Article: A Thurstonian comparison of the Tetrad and Degree of Difference tests (2015)

Abstract: The recurring need to assess product reformulations has kept difference testing at the forefront of sensory science. Within the realm of difference testing, the Tetrad test has risen in popularity recently as its superiority over the Triangle test has been demonstrated both in theory and in practice. But it remains to compare the...

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