Two stimuli must differ by a constant minimum percentage (rather than a constant amount), to be perceived as different. You will probably not notice an increase in weight if you add a 1/4 lb sandwich to a heavy, 20 lb backpack. On the other hand, if you add the sandwich to a pack that only weighs 2 lbs, you are sure to notice the increase in weight. this illustrates:.

Weber's law

Explanation:

Weber's law states that the change in a stimulus that will be just noticeable is a constant ratio of the original stimulus. It has been shown not to hold for extremes of stimulation. The ability to perceive a change in a quantity decreases in proportion to its magnitude.

those sounds of the natural world are bioacoustics, and they're more than a false-color spectrogram of data from the musiamunat conservation area.

there are indirect ways of affecting state laws   by with holding funding's. and that's why we have a 55mph speed on the high way with a design of 70mph speed.