Journal Article: Internal preference mapping and the issue of satiety (2012)

Abstract: Internal preference mapping (IPM) and Landscape Segmentation Analysis (LSA) are two techniques broadly used to unfold consumers’ overall product liking ratings and create spatial maps that will provide further insights on consumers’ preferences. IPM is based on a vector model while LSA involves an ideal point model. Through a simulation and the analysis...

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Journal Article: Accounting for no difference/preference responses or ties in choice experiments (2012)

Abstract: The analysis of choice data in which no difference/preference responses, or ties, occur is considered in this paper. A key issue addressed in the paper is the need for ‘‘identicality norms’’ for difference and preference tests. These norms reflect the researcher’s expectation for the number of ties that would have occurred in the...

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Journal Article: eTURF: A competitive TURF algorithm for large datasets (2012)

Abstract: Although Total Unduplicated Reach and Frequency (TURF) analysis has repeatedly demonstrated value in a variety of market research applications, TURF analyses on large problem sizes have historically either been unacceptably slow or approximate in their solutions. To resolve this dilemma, we begin by identifying and explaining the principle of non-synergy that is present...

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Journal Article: The power of sensory discrimination methods revisited (2011)

Abstract: “The power of sensory discrimination methods” (PSDM) was published in this journal in 1993.PSDM clarified the need for power considerations in the interpretation of testing results while providing a series of sample size tables. Despite the fact that the data considered in PSDM were binomially distributed, a normal approximation was used that both...

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Journal Article: Validating a graph theoretic screening approach to food item combinations (2011)

Abstract: Tools from the mathematical field of graph theory potentially allow the consumer scientist to efficiently analyze large numbers of combinations of food items, such as components on a salad. In this study, we tested the validity of such an approach.We began by asking subjects whether or not pairs of ingredientswould be appropriate to...

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Journal Article: Confidence bounds for multiplicative comparisons (2011)

Abstract: Statements that are inherently multiplicative have historically been justified using ratios of random variables. Although recent work on ratios has extended the classical theory to produce confidence bounds conditioned on a positive denominator, this current article offers a novel perspective that eliminates the need for such a condition. Although seemingly trivial, this new...

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Journal Article: Equivalence hypothesis testing: Reply to Bi (2010)

Abstract: Berger and Hsu (1996a), whom Bi cites as a source for the IUT principle and the TOST, were sufficiently dissatisfied with the TOST as a test of bioequivalence that they developed their own alternative in the same paper. The idea for the TOST did not come from IUT principles, it came from the...

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Journal Article: Equivalence hypothesis testing (2010)

Abstract: In statistical applications, such as a comparison of two items, it is useful to know whether one item is equivalent to another. Similarly it is often desirable to know whether one item can act as a substitute for another. Applications of the concept of equivalence include blend and flavor modifications of products, substitution...

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Journal Article: Describing the universal cover of a noncompact limit (2010)

Journal Article: Describing the universal cover of a noncompact limit (2010)

Abstract: This article appears as: Ennis, J. M. and Wei, G. (2010). Describing the universal cover of a noncompact limit. Geometry & Topology, 14(4), 2479-2496. Colleagues can request this journal article here: Describing the universal cover of a noncompact limit Not a Colleague? Click here to join for free!

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