Multiple choice

The idea that the amount of change in a stimulus, necessary to produce a JND, is a constant proportion of the stimulus intensity is called

  1. James' law

  2. the all-or-none principle

  3. the law of diminishing returns

  4. Weber's law

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Weber's law states that the JND (just noticeable difference) is a constant proportion of stimulus intensity. For example, a 10% change in weight is noticeable whether holding 100g or 1000g. James' law (not Weber's), the all-or-none principle (neurons firing), and law of diminishing returns (economics/productivity) are incorrect.