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The Institute for Perception |
| Developing Advanced Research Tools for Human Perceptual Measurement |
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FOUNDATIONS OF SENSORY SCIENCE: THURSTONIAN MODELS
General presentation illustrating the theory and applications of Thurstonian models. We will describe the broad relevance of these models in discrimination testing, rating methods and multidimensional mapping including hedonic measurement.
DIFFERENCE TESTING: THEORY AND APPLICATIONS
Strengths and weaknesses of a wide range of discrimination methodologies are described in the context of statistical power and similarity testing. Such concepts are particularly useful to optimize discrimination testing efficiency.
METHODS AND MODELS FOR SCALING SENSORY MAGNITUDES
A common approach to measuring sensory differences is outlined. Methodologies described include a variety of rating procedures and discrimination methods.
THE SAME-DIFFERENT METHOD
The decision criterion (t) is introduced and its importance in the handling of same-different judgments is demonstrated. A bias-free measure of difference is obtained. Generalization to the degree of difference method is also described.
DESIGNS AND MODELS FOR THE A-NOT METHOD
A Thurstonian model for the A-Not A method is given. Designs and corresponding appropriate statistical techniques for handling replicated measures are outlined.
REPLICATED DIFFERENCE AND PRODUCT TESTING
A useful model for replicated difference and preference testing is introduced (beta-binomial). Essential steps to ensure appropriate handling of replicated measurements are described.
MEMORY AND SEQUENTIAL EFFECTS IN SENSORY TESTING
Experimental variables having an effect on product discriminability are identified and their effects summarized. Approaches to use them to the researcher’s advantage are outlined.
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