Question

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:____________.

Answer 1

Weber's law

Step-by-step 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.