Giulio holds a bag of 70 marbles in his hands.Jim blindfolds Giulio and keeps adding marbles to Giulio's bag,one at a time.However,Giulio notices the difference in the weight only after Jim has added 5 marbles.They now repeat the same experiment with a bag of 140 marbles.This time,Giulio notices the difference in the weight only after Jim has added 10 marbles.This scenario BEST illustrates:
A)signal detection theory.
B)Weber's law.
C)accommodation.
D)Ricco's law.

Question

Quizplus · Accepted Answer

Weber's law states that the just noticeable difference (JND) between two stimuli is proportional to the magnitude of the stimuli. In this scenario, the JND for Giulio is 5 marbles out of 70 in the first experiment and 10 marbles out of 140 in the second experiment. This is consistent with Weber's law, which describes the relationship between the magnitude of the stimuli and the JND. The other options are not applicable in this scenario.

Giulio Holds a Bag of 70 Marbles in His Hands