In psychology, Weber's law states that the size of the jnd, amount it takes you to notice something changed, changes, directly, with the size of the standard.
For example, say we have a given object, the standard, that weighs 5 pounds. The jnd of this object will be half that of an object that weighs 10 pounds. The jnd of an object weighing 20 pounds will be 4 times the one weighing 5 pounds, and so on.

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