What happens to sensitivity when the initial stimulus intensity is lower, according to Weber's law?

According to Weber's law, which deals with the perception of changes in stimuli, as the initial stimulus intensity decreases, the sensitivity to detect changes in that stimulus actually increases. This relationship indicates that when a stimulus is weaker, a smaller change can be detected more easily. Therefore, sensitivity doesn't decrease; instead, it becomes heightened in the context of smaller initial stimuli, allowing for better discernment of differences.

This principle is grounded in the concept of relative change rather than absolute change. For instance, if you're in a dark room, even a small amount of light can be more easily noticed compared to a brightly lit room where the same amount of additional light would be less noticeable. Thus, when the stimulus begins at a lower intensity, our perceptual system is more attuned to changes, leading to increased sensitivity.