Lucas is a sommelier, or a wine taster, whose task is to taste the slightest flavor differences between two wines. this is an example of absolute threshold sensory limitation subliminal stimulation difference threshold

Psychophysics is part of the psychology that deals with the relationship of various physical stimuli and psychological sensations that these stimulus causes. Psychophysics studies these phenomena through detection, identification, discrimination and scaling. In this case, it is about scaling, when a person needs to have a theoretical framework and to make empirical operations aware of the minimal differences. It is necessary to determine the slightest flavor differences, i.e. to feel two very little different sensations. The minimum difference in the intensity of the two sensations is difference threshold.

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