Giulio's bag of marbles is twice as heavy as Jim's. If it takes 5 extra marbles to make Jim's bag feel heavier,it will take 10 extra marbles to make Giulio's bag feel heavier. This best illustrates

A) the opponent-process theory.
B) bottom-up processing.
C) sensory adaptation.
D) Weber's law.

Weber's Law

A principle stating that the smallest noticeable difference in stimulus intensity is proportional to the intensity of the original stimulus.

Marbles

Small, spherical objects often made of glass, clay, or plastic, used as toys in various games or as collectible items.

Opponent-Process Theory

A psychological and neurological model that explains how humans perceive colors as opposite pairs and why strong emotions are often followed by opposite emotions.