According to Weber's Law,how many grams would have to be added to a 150 gram weight to get a just noticeable difference?
A)1 g
B)3 g
C)8.5 g
D)25 g

Question

Quizplus · Accepted Answer

Weber's Law states that the just noticeable difference between two stimuli is proportional to the magnitude of the stimuli. The proportionality constant is known as the Weber fraction, which varies depending on the type of stimuli. For weights, the Weber fraction is approximately 1/50. Therefore, the just noticeable difference for a 150-gram weight would be 150/50 = 3 grams. Adding 3 grams to the weight would create a noticeable difference. Therefore, the best choice is B, adding 3 grams.

According to Weber's Law,how Many Grams Would Have to Be