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Related to just-noticeable difference: Weber's law
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|Noun||1.||just-noticeable difference - (psychophysics) the difference between two stimuli that (under properly controlled experimental conditions) is detected as often as it is undetected|
difference limen, difference threshold, differential limen, differential threshold - the smallest change in stimulation that a person can detect
psychophysics - the branch of psychology concerned with quantitative relations between physical stimuli and their psychological effects