Final answer:
Weber's Law is defined as the principle that the just-noticeable difference for any given sense is a constant proportion of the stimulation being judged. It contrasts with the concept of an absolute threshold, which is the minimum amount of stimulus energy required for detection 50% of the time. Weber's Law applies to the difference threshold, indicating that larger stimuli require larger differences to be noticed. The correct option is B.
Step-by-step explanation:
Weber's Law can be best defined as the principle that the just-noticeable difference (jnd) for any given sense is a constant proportion of the stimulation being judged. In other words, for someone to perceive a difference between two stimuli, the difference must be proportional to the magnitude of the original stimulus.
This means that the jnd (or difference threshold) is larger when dealing with larger stimuli. For example, if you are holding a one-pound weight, you may notice an additional ounce added to it.
However, if you are holding a ten-pound weight, you might not notice the additional ounce; the increment that you would notice as an added weight to the ten-pound weight would be proportionally bigger than the one ounce.
The term you are referring to is the absolute threshold, which is the minimum amount of stimulus energy that must be present for the stimulus to be detected 50% of the time.
The difference threshold or the jnd, differs from the absolute threshold in that it relates to the smallest change in a stimulus that can be detected and varies depending on the stimulus intensity. Weber's law specifically addresses the difference threshold, not the absolute threshold.