Using Weber's Law, if the DL for a 100 gram weight standard is 2 grams, then the DL when using a 200 gram standard would be ____ grams.
A) 0.02
B) 2
C) 4
D) 50

Question

Quizplus · Accepted Answer

Weber's Law states that the DL (Difference or Just Noticeable Difference) is proportional to the magnitude of the stimulus. Specifically, it states that the DL is a constant fraction or percentage of the stimulus intensity. This fraction is known as the Weber Fraction, symbolized as k.

The formula for Weber's Law is ∆I/I = k, where ∆I is the minimum difference between two stimuli required for someone to perceive a difference, I is the standard stimulus intensity, and k is the Weber Fraction.

To find the DL when using a 200 gram weight standard, we can use the formula ∆I/I = k and solve for ∆I:
2/100 = k
k = 0.02

Now that we know the Weber Fraction for this task is 0.02, we can use it to find the DL for a 200 gram weight standard:
∆I/200 = 0.02
∆I = 4 grams

Therefore, the DL when using a 200 gram standard would be 4 grams.

Using Weber's Law, If the DL for a 100 Gram