The term "different" refers to the perception of stimuli as distinct or dissimilar from one another based on a constant minimum percentage difference, rather than a fixed amount.
Related terms
JND (Just Noticeable Difference): JND refers to the smallest detectable difference between two stimuli. It is also known as the difference threshold.
Weber's Law: Weber's Law states that for two stimuli to be perceived as different, they must differ by a constant proportion or percentage rather than a fixed amount.