Jenny did not blink an eye when she paid an extra fifty cents for her favorite CD, but almost fell out of the car when her local gas station raised the price of gas by a dollar over night. What concept best explains her contradicting reactions?
A) absolute threshold
B) just noticeable difference
C) subliminal perception
D) Weber's law

Question

Quizplus · Accepted Answer

Weber's law states that the size of a just noticeable difference (JND) is a constant proportion of the original stimulus. In this case, Jenny's reaction to the price increase for gas is more extreme than her reaction to the price increase for the CD because the JND for the price of gas is larger (a dollar) compared to the JND for the price of the CD (fifty cents).

Jenny Did Not Blink an Eye When She Paid an Extra