Journal Articles

Journal Article: Importance of correct instructions in the tetrad test (2013)

Abstract: Use of the tetrad test has increased recently as both theoretical and experimental results have shown that it is statistically more powerful than the triangle test. In this article, although, we show that this power advantage depends on the choice of instructions. Specifically, we show that if experimenters ask respondents to select the...

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Journal Article: A Thurstonian Analysis of the Two-Out-of-Five Test (2013)

Abstract: The Two-Out-of-Five test is a method of unspecified difference testing. Although its low guessing probability (1/10) gives promise that it might have high power, the theoretical underpinnings of the method have not yet been investigated. In this article, we offer the first such investigation, via Thurstonian analysis. This investigation reveals that the standard...

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Journal Article: The year of the tetrad test (2013)

Abstract: A long-standing problem in sensory has been the absence of sensitive testing methods when the nature of the difference is not known. It has been a remarkable year for the Tetrad test in terms of providing a reasonable solution to this problem. Consequently, the journal Editor-in-Chief, Dr. Chambers, has graciously asked me to...

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Journal Article: Investigating the single ideal assumption using Ideal Profile Method (2013)

Abstract: Ideal point modeling is a type of multivariate mapping in which consumers are assumed to use internal ideals in their hedonic evaluation of products. In their calculation processes, these techniques typically assume that consumers have a unique ideal for the product set tested. But this assumption is difficult to verify from the liking...

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Journal Article: Analysis and Thurstonian scaling of applicability scores (2013)

Abstract: Check-all-that-apply (CATA) lists are commonly used in both survey research and sensory science. A related technique, referred to in this paper as applicability scoring, requires respondents to respond positively or negatively to the item of interest – applicability scoring differs from CATA as CATA only requires a check when the item applies to...

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Journal Article: A Thurstonian ranking model with rank-induced dependencies (2013)

Abstract: A Thurstonian model for ranks is introduced in which rank-induced dependencies are specified through correlation coefficients among ranked objects that are determined by a vector of rank-induced parameters. The ranking model can be expressed in terms of univariate normal distribution functions, thus simplifying a previously computationally intensive problem. A theorem is proven that...

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Journal Article: A comparison of adaptive choice-based conjoint and choice-based conjoint to determine key choice attributes of sour cream with limited sample size (2012)

Abstract: Adaptive choice-based conjoint (ACBC) analysis is a technique that uses choice data and incorporates it into an adaptive interviewing experience. ACBC analysis has been suggested to provide more accurate information at the individual level, which can lead to better predictions even when using smaller sample sizes. A comparison of a traditional choice-based conjoint...

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Journal Article: A large-scale experimental comparison of the tetrad and triangle tests in children (2012)

Abstract: Interest in the Tetrad test as an alternative to the Triangle test is growing as theoretical results indicate that the Tetrad test has relatively high power for an unspecified method. But a large-scale experimental comparison of the Tetrad test with the Triangle test for the same stimuli has not yet appeared in the...

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Journal Article: Guiding the switch from triangle testing to tetrad testing (2012)

Abstract: Tetrad testing is theoretically more powerful than Triangle testing, yet the addition of a fourth stimulus raises questions – it is possible that the addition of a fourth stimulus places such an additional demand on subjects that the theoretical advantage of the Tetrad test is lost. In this paper, we provide a guideline...

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Journal Article: Assignment-minimal clique coverings (2012)

Abstract: The search for minimum clique coverings of graphs appears in many practical guises and with several possible minimization goals. One reasonable goal is to minimize the number of overall cliques in a covering, while a second less well-studied but equally reasonable goal is to minimize the number of individual assignments of vertices to...

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