CHAPT. 5 – When two different products are compared in various situations

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“…specific models such as the Thurstonian model, and the Bradley-Terry model have to be considered. These models allow evaluating if the products are perceived similarly or not, or if one is better than the other. In practice, three very nice packages are dedicated to such models, the sensR package for discrimination tests, the BradleyTerry2 and the prefmod packages for paired comparisons.

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