Journal Article: Are three-sample tasks less sensitive than two-sample tasks? Memory effects in the testing of taste discrimination (2004)

Abstract: In order to provide insights into why discrimination protocols with three stimuli sometimes tend to be less sensitive than protocols with two stimuli, two experiments were conducted. In these experiments,the relative effects of memory decay and memory interference were investigated. Both experiments involved purified water and/or solutions of low NaCl concentration. In Experiment...

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Journal Article: Corroborating the 2-AFC and 2-AC Thurstonian models using both a model system and sparkling water (2004)

Abstract: Two experiments were conducted to investigate the suitability of the Thurstonian models for the 2-AFC (2-alternative forced choice) and 2-AC protocols (2-AFC test with a "no difference" option). The Thurstonian approach predicts that if the same subjects and products are used, the degree of difference measured between the products  (d0) should be the...

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Journal Article: Motivations for product consumption: Application of a probabilistic model to adolescent smoking (2004)

Abstract: This paper describes a method that can be used to investigate consumers’ reported reasons for using a particular product. This method is applied to ratings of degree of agreement with statements about reasons for product use. The method is illustrated using data on self-reported reasons for smoking among adolescents. The approach used is...

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Journal Article: A model of dopamine modulated cortical activation (2003)

Abstract: Standard techniques from pharmacology and current theories on the biochemistry of dopamine (DA) are used to derive a new model of how DA modulates cortical activation. The model assumes that DA potentiates the glutamate response through the NMDA receptor and depresses the glutamate response through non-NMDA receptors. A static version of the model...

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Journal Article: Discrimination testing: A few ideas, old and new (2003)

Abstract: The present article provides an overview of our current knowledge on the topic of discrimination testing. First, the various goals of discrimination testing are outlined in terms of the objective of the investigation: psychophysics (understanding how the human senses work), Sensory Evaluation I (using the human senses as instruments to evaluate food characteristics)...

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Journal Article: Foundations of sensory science (2003)

Abstract: The previous pages contain several well-written essays by the other contributors, based on their business and consulting experiences, on a wide range of topics related to product testing. Many of these essays deal with non-scientific issues in politics, management and history. Examples include discussions on turf battles between market research and sensory departments,...

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Journal Article: The cognitive neuroscience of implicit category learning (2002)

Abstract: There is much recent interest in the question of whether people have available a single category learning system or a number of qualitatively different systems. Most proponents of multiple systems have hypothesized an explicit, rule-based system and some type of implicit system. Although there has been general agreement about the nature of the...

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Journal Article: A Thurstone-Coombs model of concurrent ratings with sensory and liking dimensions (2002)

Abstract: A popular product testing procedure is to obtain sensory intensity and liking ratingsfrom the same consumers. Consumers are instructed to attend to the sensory attribute, such as sweetness, when generating their liking response. We propose a new model of this concurrent ratings task that conjoins a unidimensional Thurstonian model of the ratings on...

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Journal Article: The multiple dual-pair method (2002)

Abstract: A model for the multiple dual-pair method, a generalization of the traditional dual-pair (4IAX) paradigm, is given. This model is expressed in terms of normal and beta distributions. This generalization allows for the simultaneous estimation of the perceptual distances among three or more stimuli. This model has applications in cases in which multiple...

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Journal Article: Investigating more powerful discrimination tests with consumers: effects of memory and response bias (2002)

Abstract: Two experiments were conducted to investigate the sensitivity of four discrimination methods when they were performed by consumers. In Experiment I, the influence of memory in the duo-trio method was studied. Three versions of the duo-trio method with different memory requirements were considered. Calculated d0 values indicated a higher sensitivity for the duo-trio...

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