科研之友
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摘要
To gain insight into the proportion of consumers who respond to extraneous factors in the paired preference testing situation, rather than the sensory properties of products being assessed, placebo preference tests with putatively identical products are used. One use is as a tool to select consumers who ignore extraneous factors and are thus suitable for use in preference tests, where experimenters wish to have confidence that consumers are ignoring extraneous factors and responding only to the sensory attributes of the products being tested. Yet, selecting such consumers tends often to reduce the sample size to approximately 20-35% of its original, which is unacceptably low. The protocol used in this study employed unusual instructions and questions to reverse the hidden demand characteristics of the test, so that the sample size was only reduced to 80-90% of its original. Practical ApplicationsPaired preference tests are part of the battery of tests used for measuring food acceptance. Although, when used casually, the test is simple; when used for a formal assessment of acceptance, there are problems that must be addressed. One such problem is the tendency of consumers to respond with preferences, even when the stimuli are putatively identical. Such a bias has the potential to produce an overestimation of preferences, when products are being assessed by paired preference protocols. Accordingly, research into this phenomenon is worthwhile, so that more valid and reliable tests can be developed.
- 出版日期2014-4
- 单位江南大学
