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Paired versions of various sensory discrimination forced-choice methods and the same-different area theorem

Title
Paired versions of various sensory discrimination forced-choice methods and the same-different area theorem
Authors
Bi J.Kuesten C.Lee H.-S.O'Mahony M.
Ewha Authors
이혜성
SCOPUS Author ID
이혜성scopus
Issue Date
2018
Journal Title
Food Quality and Preference
ISSN
0950-3293JCR Link
Citation
Food Quality and Preference vol. 63, pp. 97 - 106
Keywords
Dual-pairPaired version of specified ‘M+N’Psychometric functionSame-different area theoremSensory discrimination methodSignal Detection TheoryThurstonian model‘M+N’ test
Publisher
Elsevier Ltd
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
This paper proposes a new type of sensory discrimination methods, i.e., paired versions of various sensory discrimination forced-choice methods, which can be regarded as modified versions of the same-different method. The new type of methods possesses the advantage of the same-different test for measuring overall sensory difference, but overcomes its weaknesses of large variations of response bias and lower testing power. An important finding is that this type of methods is closely related to the same-different area theorem and its extension. The same-different area theorem establishes an equivalence between the area under the receiver operating characteristic (ROC) curve of the same-different method and the proportion of correct responses (Pc) in the dual-pair method. This paper re-demonstrates and extends the same-different area theorem. An analytical expression of a general psychometric function for the new type of methods is derived. Performances of the new type of methods are evaluated with testing power and sample size in both difference and similarity/equivalence tests. R codes are provided for the new type of methods for Pc, Thurstonian discriminal distance δ, and variance of d′, where d′ is an estimator of δ. © 2017 Elsevier Ltd
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DOI
10.1016/j.foodqual.2017.08.003
Appears in Collections:
엘텍공과대학 > 식품공학전공 > Journal papers
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