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Chapter 5: Problem 27

Please generate a novel example of how just noticeable difference can change as a function of stimulus intensity.

Short Answer

Expert verified
The just noticed difference (JND) increases as the stimulus intensity increases. This can be demonstrated using an example with weights. When holding a small weight (100g), an addition of 1g might be noticeable. However, when holding a heavier weight (1000g), an addition of the same 1g becomes significantly harder to detect, showing that JND is larger at this greater stimulus intensity.

Step by step solution

01

Understanding the concept of JND and stimulus intensity

The concept of the just noticeable difference (JND) is one of the foundations of psychophysics which shows the minimal detectable change between two sensory inputs. The stimulus intensity refers to the magnitude or strength of the stimulus.
02

Setting our example

Let's consider an example using weights. Suppose you are holding a 100-gram weight in your hand and someone adds an additional 1 gram to it. You may likely notice the difference, so here JND = 1 gram.
03

Illustrate change in stimulus intensity

Let's now raise the intensity of the stimulus. If you were holding a 1000-gram (or one kilogram) weight and the same one gram was added, it would be significantly harder to detect the addition. Therefore, we expect the JND to increase as the stimulus intensity increased.
04

Establishing the relationship

This relationship between JND and stimulus intensity is constant, and it's a cornerstone of Weber’s Law. The JND for any given sense is a constant proportion of the magnitude of the original stimulus. The principle illustrates that as the stimulus increases, larger changes are required for them to become noticeable.

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