Moderate

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:

Correct answer: D. Weber's law

  • A. James law
  • B. The all-or-none principle
  • C. The law of diminishing returns
  • D. Weber's law

Explanation

Weber’s law states that the just noticeable difference is a constant proportion of the original stimulus intensity, expressed as ΔI/I. The other principles do not describe this psychophysical relationship.

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