Answer :

Final answer:

The absolute threshold represents the minimum stimulus intensity required for detection, crucial in sensory systems.


Explanation:

The absolute threshold of a sensation is defined as the intensity of a stimulus that allows an organism to just barely detect it. It refers to the minimum amount of stimulus energy required for detection 50% of the time. For example, in a dark movie theater, the illumination change from a cell phone screen can be detected due to this threshold.


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