According to Weber's law, what is the relationship between physical stimulus intensity and change in perceived intensity?

Weber's law articulates that the change in perceived intensity of a stimulus is proportional to the original intensity of that stimulus. This principle indicates that for a person to perceive a difference in intensity, the change must be a constant fraction of the original stimulus. This relationship suggests that as the intensity of the stimulus increases, a greater change is required for the same level of perception change to be noticed.

This aligns with the idea of a linear relationship, as the ratio between the change in stimulus intensity and the original intensity remains consistent. This means that if you double the intensity of the stimulus, you would need to increase the change required to perceive that difference at the same ratio. The law captures the essence that our sensory perceptions are not absolute but are instead relative to the starting point of the stimulus intensity, maintaining a linear proportionality.

In contrast, the alternatives presented depict various other relationships that do not accurately reflect Weber's findings on how perceived intensity fluctuates with changes in physical stimulus intensity. Therefore, the correct understanding of Weber's law underscores a linear relationship in perception changes relative to original stimulus intensities.