Thurstonian models for three variants (specified, unspecified, and unspecified with forgiveness) of the Two-Out-of-Five method

IF 1.6 3区农林科学 Q3 FOOD SCIENCE & TECHNOLOGY

Journal of Sensory Studies Pub Date : 2023-09-04 DOI:10.1111/joss.12878

Jian Bi, Carla Kuesten

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引用次数: 1

Abstract

The Two-Out-of-Five method is one of the basic sensory discrimination methods. It is a special case of the ‘M+N’ method with M = 3 and N = 2. Three variants of the method are discussed in the paper: specified, unspecified, and unspecified with forgiveness. Analytical and simulation-derived psychometric functions for all three variants of the Two-Out-of-Five method are derived and produced. The performance of the method in both difference and similarity/equivalence tests are explored. It is shown that both difference and similarity/equivalence testing powers for the specified Two-Out-of-Five are larger than those for the 2-AFC and 3-AFC. Both difference and similarity/equivalence testing powers for the unspecified Two-Out-of-Five are larger than those for the Triangle and Duo-trio. Both difference and similarity/equivalence testing powers for the unspecified with forgiveness Two-Out-of-Five are larger than those for the conventional unspecified Two-Out-of-Five and unspecified Tetrads. Tables and R codes are presented and provided for estimations of the probability of correct response, P_c, Thurstonian discriminal distance $δ$ or d', and the B value for estimating the variance of d' for the three variants of the Two-Out-of-Five method.

Practical Applications

The Two-Out-of-Five method is a powerful sensory discrimination method. However, this method has not been used widely in sensory and consumer research, partly since the method has not been explored adequately in the literature. This paper explores the Two-Out-of-Five method and shows that the method has potential for wide application. The Two-Out-of-Five method involves a larger number of samples (5) and sensory fatigue may be of concern. Hence, the method may not be suitable for taste and smell tests with strong stimuli. The method is particularly suitable for manual and visual inspection testing where sensory fatigue is of a lesser concern.

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瑟斯顿模型的三种变体(指定的，未指定的和未指定的)的两出五方法

五选二法是一种基本的感官辨别方法。这是“M+N”方法的一个特例，其中M = 3和N = 2.本文讨论了该方法的三种变体：指定、未指定和带宽恕的未指定。推导并产生了五选二方法所有三种变体的分析和模拟衍生的心理测量函数。探讨了该方法在差异测试和相似性/等价性测试中的性能。结果表明，规定的五选二的差异和相似性/等效性测试功率均大于2-AFC和3-AFC的测试功率。未指定的“五选二”的差异和相似性/等效性测试功率均大于三角形和二人组的测试功率。未指定的五分之二豁免的差异和相似性/等效性测试功率均大于传统的未指定的四分之二和未指定的四面体。给出并提供了表和R代码，用于估计正确响应的概率、Pc、Thurstonian判别距离或d'，以及用于估计五取二方法的三种变体的d'方差的B值。五选二法是一种强大的感官辨别方法。然而，这种方法并没有在感官和消费者研究中得到广泛应用，部分原因是文献中没有充分探讨这种方法。本文探索了五选二方法，并表明该方法具有广泛应用的潜力。五选二方法涉及大量样本（5），可能会引起感觉疲劳。因此，该方法可能不适用于具有强烈刺激的味觉和嗅觉测试。该方法特别适用于感觉疲劳不太重要的手动和目视检查测试。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Sensory Studies 工程技术-食品科技

CiteScore

3.80

自引率

20.00%

发文量

审稿时长

18-36 weeks

期刊介绍： The Journal of Sensory Studies publishes original research and review articles, as well as expository and tutorial papers focusing on observational and experimental studies that lead to development and application of sensory and consumer (including behavior) methods to products such as food and beverage, medical, agricultural, biological, pharmaceutical, cosmetics, or other materials; information such as marketing and consumer information; or improvement of services based on sensory methods. All papers should show some advancement of sensory science in terms of methods. The journal does NOT publish papers that focus primarily on the application of standard sensory techniques to experimental variations in products unless the authors can show a unique application of sensory in an unusual way or in a new product category where sensory methods usually have not been applied.