When it comes to product improvements, marketers very much want to meet or exceed the consumer s differential threshold; that is, they want consumers to readily perceive any improvements made in the original products.
2.
Thus, if the weight of 105 g can ( only just ) be distinguished from that of 100 g, the JND ( or differential threshold ) is 5 g, or in the SI system, a force or weight of 0.005 kg N . If the mass is doubled, the differential threshold also doubles to 10 g, so that 210 g can be distinguished from 200 g.
3.
Thus, if the weight of 105 g can ( only just ) be distinguished from that of 100 g, the JND ( or differential threshold ) is 5 g, or in the SI system, a force or weight of 0.005 kg N . If the mass is doubled, the differential threshold also doubles to 10 g, so that 210 g can be distinguished from 200 g.
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