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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