Phase I: Consumer assessment
List of attributes: In the first step of the consumer assessment phase, eight attributes reported in the literature were chosen to be evaluated during the usability tests.9,56 Each set of words describing the attributes was selected after asking four experts to brainstorm keywords that could be used to describe skin moisturizers, and then to classify them in each category. The two most repeated terms were selected to represent each attribute, as shown in Table 1.
Table 1. List of main attributes for cosmetic emulsions