The purpose of this work was to explore different methodologies, using both verbal and non-verbal parameters, to collect the emotional potential of rheological modifiers and cosmetic formula textures. Known or new methods, first tested in cosmetics, have been investigated under the supervision of neuroscience experts, analyzing subjective, behavioural and physiological parameters (i.e. verbatim, prosody, gesture, brain activity with dynamic analysis). Verbal methods provided contrasting responses according to protocol. Consumers spontaneously expressed technical descriptors, highlighting the growing education on cosmetics and showing the value of carefully designing the protocol and controlling the testing environment to get away from rational thinking. Short time in response and a preliminary stage of sensory stimuli helped to express emotions. The combination of verbal and non-verbal parameters has been shown to be useful in achieving more subtle effects when a rheological modifier is changed into a basic formula. The unconscious physical parameters of the voice (i.e. prosody) and gesture provided complementary data with a corresponding positive or negative emotional valence. The new experiment in dynamic brain activity analysis has proven to be a promising tool. The studies, carried out mainly in France but also in China, systematically demonstrated the influence of texture and rheology modifiers on the emotions generated.
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