Attribute Word 1 Word 2
Thickness Thick Thin*
Spreadability Easy to spread Glides easily
Stickiness Sticky Light*
Ease of absorption Easily absorbed Penetrates quickly
Freshness Fresh sensation Cold sensation
Residues Whitening on rub-out Leaves residues
Greasiness/oiliness Greasy Oily sensation
Moisturization More hydrated skin Softer skin
*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 skin moisturizer, we conducted usability tests 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).  Then they answered the set of questions corresponding to each word in Table 1, using an ordinal scale (from  1 being "not at all" to 5 being "very much"). The complete survey form – in French (original) and English – and the results are presented in Section B of the Supplementary material.