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What Is the Just-Noticeable Difference?

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Definition:

The just noticeable difference (JND), also known as the difference threshold, is the minimum level of stimulation that a person can detect 50-percent of the time. For example, if you were asked to hold two objects of different weights, the just noticeable difference would be the minimum weight difference between the two that you could sense half of the time.

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Also Known As: Difference Threshold

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