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Example of Just Noticeable Difference
An example of the just noticeable difference can be seen by comparing the visibility of a cell phone screen in different environments. In a dark movie theater, the light from a phone screen is a significant change in illumination and is easily noticed. However, in a brightly lit basketball arena, the same phone screen light would likely go unnoticed because the change in illumination is not significant enough relative to the high intensity of the existing background light.
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Ch.5 Sensation and Perception - Psychology @ OpenStax
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Introduction to Psychology @ OpenStax Course
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OpenStax Psychology (2nd ed.) Textbook
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Weber's Law
Example of Just Noticeable Difference
A chef is seasoning a pot of soup. When the soup is lightly seasoned, they notice that adding just a small pinch of salt makes a detectable difference in taste. However, when the soup is already very salty, they find they must add a much larger amount of salt to notice any change in the taste. Which of the following principles best explains this observation?
A chef is preparing a soup. When the soup is lightly seasoned, they add a single grain of salt and can immediately taste the difference. Later, after the soup has been heavily salted, they add another single grain of salt but cannot detect any change in the taste. Which of the following statements best explains this experience?