Hans and Franz Lift Weights at Their Local Gym

Multiple Choice

Hans and Franz lift weights at their local gym. When their trainer adds a two-pound weight to Hans's normal 50-pound load, Hans immediately notices. However, when the same two-pound weight is added to Franz's normal 200-pound load, he isn't aware of the extra weight. The difference in Hans's and Franz's experience is consistent with

A) absolute threshold theory.
B) difference threshold theory.
C) Weber's Law.
D) signal-detection theory.
E) Gestalt laws of perceptual organization.