Weber and Fecher found
A)That it is easier to tell the difference between a 25 and a 50-watt light bulb than it is to tell the difference between a 100-watt bulb and a 300-watt bulb
B)That the minimally perceptible difference is roughly proportional to the original intensity of the stimulus
C)That the minimally perceptible difference is inversely proportional to the original intensity of the stimulus
D)Consumers are more likely to drive 10 blocks to save $5 on a $500 television than they are to drive 10 blocks to save $5 on a $25 clock

Question

Quizplus · Accepted Answer

Weber's law states that the just noticeable difference (or the smallest noticeable difference between two stimuli) is proportional to the original stimulus intensity. Fechner expanded upon Weber's law to state that the smallest noticeable difference is actually a logarithmic function of the original intensity. Therefore, choice B is the correct answer. Choice A is incorrect because Weber's law does not state that it is easier to tell the difference between two stimuli of different magnitudes than it is between two stimuli of similar magnitudes. Choice C is incorrect because it is the opposite of what Weber's law and Fechner's law actually state. Choice D is unrelated to Weber's law or Fechner's law and is irrelevant to the question being asked.

Weber and Fecher Found