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.

when the united states took over

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.