Technical Reports

Technical Report: How to Diagnose the Need for 3D Unfolding

Technical Report: How to Diagnose the Need for 3D Unfolding

ABSTRACT Multivariate mapping techniques are frequently and commonly used to visualize the large amount of data generated in sensory and consumer testing experiments. Since it is desirable to summarize data using as simple a model as possible, multidimensional solutions that capture the relevant information with fewer dimensions are usually prioritized. Moreover, it is less...

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Technical Report: Transitioning from Proportion of Discriminators to Thurstonian Delta

Technical Report: Transitioning from Proportion of Discriminators to Thurstonian Delta

ABSTRACT In a previous technical report we discussed a commonly used measure of sensory difference, the proportion of discriminators (Pd), and explained that this measure is method specific. We concluded that: “The concept of the proportion of discriminators is intuitive and appealing. Unfortunately, it is also method-specific and one can achieve very different values using different methods,...

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Technical Report: When Are Two Products Close Enough to be Equivalent?

Technical Report: When Are Two Products Close Enough to be Equivalent?

ABSTRACT A persistent dilemma in comparing products is to know when the difference between them becomes consumer relevant. Since the probability that any two products are exactly the same is zero, rejecting the null hypothesis that they are identical may not be that informative; an analysis will always result in such rejection provided there...

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Technical Report: Proper Task Instructions and the Two-out-of-Five Test

Technical Report: Proper Task Instructions and the Two-out-of-Five Test

ABSTRACT Difference tests continue to play a prominent role as businesses investigate the sensory effects of ingredient or process changes. Even so, the importance of correct instructions in these tests is not always appreciated- incorrect instructions can reduce the ability of a test to detect real differences. The effect of instructions on the outcome of sensory difference testing was...

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Technical Report: Efficient Representation of Pairwise Sensory Information

Technical Report: Efficient Representation of Pairwise Sensory Information

ABSTRACT Pairwise comparisons appear throughout sensory science – two products can be compared for statistical difference, equivalence, compatibility, and so on. When many products are compared, there can be hundreds of these comparisons. And if these comparisons occur on each of a large number of attributes, the total number of comparisons can be in...

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Technical Report: Deciphering the Language of Emotions to Develop an Emotion Lexicon

Technical Report: Deciphering the Language of Emotions to Develop an Emotion Lexicon

ABSTRACT Recently, the investigation of consumer emotional experiences has been an area of active research1,2. Understanding these experiences can provide insights that go beyond those provided by traditional liking ratings and preference responses. One challenge that can stand between researchers and the use of this new type of data is the choice of a...

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Technical Report: Reducing Costs with Tetrad Testing

Technical Report: Reducing Costs with Tetrad Testing

ABSTRACT The Triangle test is one of the most popular discrimination methodologies used in consumer products companies. Beginning in 1941, Joseph E. Seagram and Sons were the first to employ it – since then it has been used in a variety of applications including product discrimination testing and panelist selection. An advantage of the...

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Technical Report: Interpreting Applicability Scores

Technical Report: Interpreting Applicability Scores

ABSTRACT “Check-all-that-apply” (CATA) lists are a popular tool in product tests1,2,3. In a typical test, consumers respond to a series of statements and mark those statements that apply to the product of interest. An advantage of CATA testing is that it provides an opportunity to obtain information from consumers that would be difficult in...

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Technical Report: Illuminating Product by Demographic Interactions

Technical Report: Illuminating Product by Demographic Interactions

ABSTRACT It is virtually a fundamental law of nature that people have idiosyncratic likes and dislikes. They may cluster into groups or segments of similar-minded individuals, but it is often difficult to determine what causes segments to exist. In a typical consumer product test, respondents are usually screened and profiled according to a full...

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Technical Report: From Many to Few: A Graph Theoretic Screening Tool for Product Developers

Technical Report: From Many to Few: A Graph Theoretic Screening Tool for Product Developers

ABSTRACT Michelangelo reportedly carved his many masterpieces by removing all that was irrelevant to his final goal. While this approach clearly benefited the artist, it can also serve the brand and product developer in search of best combinations of items. Whether these items are juices in a mixed-juice drink box, flavor combinations for savory...

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