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Observed discriminability is more variable than predicted by signal detection theory

Title
Observed discriminability is more variable than predicted by signal detection theory
Authors
Hautus, M. J.van Hout, D.Lee, H-SStocks, M. A.Shepherd, D.
Ewha Authors
이혜성
SCOPUS Author ID
이혜성scopus
Issue Date
2020
Journal Title
FOOD QUALITY AND PREFERENCE
ISSN
0950-3293JCR Link

1873-6343JCR Link
Citation
FOOD QUALITY AND PREFERENCE vol. 79
Keywords
Difference testsVarianceA-Not A2-AFCReminder paradigm
Publisher
ELSEVIER SCI LTD
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Food scientists and technologists are interested in how sensitive judges and consumers are to changes in product formulations. Numerous approaches to measuring sensitivity have developed at a rapid rate in the last 25 years, however, the evaluation and assessment of sensory tasks is still ongoing. The current study compared the efficiency of four difference tests (A-Not A, A-Not AR, 2-AFC, 2-AFCR) across three concentrations (difficulty levels) of orange essence. To determine which of the four tasks had the lowest variance in d', the decision strategy used by the judges first had to be ascertained. Using the rating-scale approach of signal detection theory, four estimates of sensitivity, d', were obtained for each judge (n = 10) at each of the three difficulty levels, for all four tasks. Results indicate that the majority of judges adopted the beta-strategy for the A-Not A and A-Not AR tasks, and the beta/tau-strategy for the 2-AFC and 2-AFCR tasks. The A-Not A and A-Not AR tasks produced greater estimates of d' than the other two tasks, and the A-Not A task exhibited a greater variance in d' than the other three tasks.
DOI
10.1016/j.foodqual.2019.103774
Appears in Collections:
엘텍공과대학 > 식품공학전공 > Journal papers
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