just-noticeable difference

/dʒəst ˌnoʊdəsəbəl/
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Definitions of just-noticeable difference
  1. noun
    (psychophysics) the difference between two stimuli that (under properly controlled experimental conditions) is detected as often as it is undetected
    synonyms: jnd
    see moresee less
    type of:
    difference limen, difference threshold, differential limen, differential threshold
    the smallest change in stimulation that a person can detect
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