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Comparison of performance in the A-Not A, 2-AFC, and same-different tests for the flavor discrimination of margarines: The effect of cognitive decision strategies

Title
Comparison of performance in the A-Not A, 2-AFC, and same-different tests for the flavor discrimination of margarines: The effect of cognitive decision strategies
Authors
Lee H.-S.van Hout D.Hautus M.J.
Ewha Authors
이혜성
SCOPUS Author ID
이혜성scopus
Issue Date
2007
Journal Title
Food Quality and Preference
ISSN
0950-3293JCR Link
Citation
vol. 18, no. 6, pp. 920 - 928
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The performance of three different discrimination tests (A-Not A, 2-AFC, same-different) was investigated to explore the effects of varying aspects of the test protocols, such as the familiarization procedure and retasting of the reference (A), during testing on discriminability and the cognitive decision strategy used in the tests, when discriminating between the two different margarines. Seven judges, who were not familiar with margarine products, each gave 24 ratings for each of six protocols, resulting in 168 ratings in the pooled data, and from which R-indices and d′ estimates were calculated. When both test products were presented beforehand for familiarization, judges adopted the beta cognitive decision strategy. When only the reference (A) was presented to the judges beforehand for familiarization, and the reference (A) was retasted before the test product either by prescription or at will, the tau cognitive decision strategy was adopted. When the number of samples tasted within a test increased, discriminability was considerably decreased. Such differences between test protocols were explained in terms of the concept formation of the test products, carry-over and fatigue effects, and memory problems caused by longer time-intervals between tastings. © 2007 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.foodqual.2007.03.008
Appears in Collections:
엘텍공과대학 > 식품공학전공 > Journal papers
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