Thistle notices that a snack bag of cashews seems lighter than usual and so she checks the label and finds that it is lighter by 15 grams. She decides to buy a larger bag instead and doesn't notice that the larger bag also is lighter by 15 grams. Thistle's behaviour illustrates the fact that:

Question

Quizplus · Accepted Answer

Thistle's behavior illustrates Weber's law, which states that the larger the weight of an object, the larger the change must be in order to notice a difference. In this case, Thistle didn't notice the weight change in the larger bag because it was a larger weight and therefore required a larger change in weight to be noticed.

Thistle Notices That a Snack Bag of Cashews Seems Lighter