Weber's law is I/I = K; values for K are .02 for weight,.08 for brightness,and .03 for length.If a line is 30" long,what is the minimum change in length before one would notice a difference between the two?
A)0)9"
B)0)6"
C)0)3"
D)none of the above

Question

Quizplus · Accepted Answer

Weber's law states that the just noticeable difference (JND) in a stimulus is a constant proportion of the original stimulus. In this case, the constant is K = 0.03 for length. So, the JND for a line that is 30" long is 0.03 * 30" = 0.9". Therefore, the minimum change in length before one would notice a difference between the two is 0.9".

Weber's Law Is I/I = K; Values for K Are