*Pair of words are at opposite extremes of the attribute scale
Usability tests and fuzzy integral analysis : To define consumer needs regarding the use of a cosmetic moisturizer, usability tests were conducted during two main popular events in the city of Nancy (France). Two groups, consisting of thirty-two female (average age 31 years old), tested one of the two selected reference products: a cream - Sample 1 (Atoderm® Ultra-nourishing Cream, Bioderma), and a lotion - Sample 2 (NIVEA® Body Sun protection FPS 15, Beiersdorf). and answered the set of questions corresponding to each word in Table 1, using a 5-level ordinal scale (i.e. from not at all to very much). The complete survey form – in French (original) and English – and the results are presented in the Section B of the Supplementary material.