Final answer:
The minimum difference between two stimuli required for detection 50% of the time is referred to as the Just Noticeable Difference (JND) or difference threshold.
Step-by-step explanation:
The minimum difference between two stimuli required for detection 50% of the time is called the Just Noticeable Difference (JND) or difference threshold. This is not to be confused with the absolute threshold, which refers to the minimum amount of stimulus energy that must be present for the stimulus to be detected 50% of the time.
The JND is contingent upon the intensity of the stimulus and varies according to Weber's law, which states that the difference threshold is a constant fraction of the original stimulus.
The minimum difference between two stimuli required for detection 50% of the time is called the just noticeable difference (JND).
The just noticeable difference (JND) is the smallest change in stimulus that can be detected by an individual. It is also known as the difference threshold.