The principle that two stimuli must differ by a constant minimum proportion for their difference to be perceived is known as

Question

Quizplus · Accepted Answer

The principle described is Weber's law, which states that the difference threshold (minimum noticeable difference) is a constant proportion (not a constant amount) of the original stimulus. For example, if the original stimulus is a 10-pound weight, the difference threshold might be 1 pound (10%) for someone to notice a difference, but if the original stimulus is a 100-pound weight, the difference threshold would be 10 pounds (still 10%).

The Principle That Two Stimuli Must Differ by a Constant