For stimuli such as electric shocks,where the jnd's become smaller with higher intensities,the psychophysical relationship is best expressed by:

Question

Quizplus · Accepted Answer

Steven's power law states that the perceived intensity of a stimulus is proportional to its physical intensity raised to a certain power. This relationship is maintained even for stimuli such as electric shocks where the jnd's become smaller with higher intensities. Fechner's law is a special case of Steven's power law where the exponent is fixed at 1. Weber's law, on the other hand, applies only to small changes in stimulus intensity where the jnd is a constant proportion of the original stimulus intensity. Therefore, Steven's power law is the best choice for this type of stimuli.

For Stimuli Such as Electric Shocks,where the Jnd's Become Smaller