During the study, participants estimated how far a water bottle was from where they were sitting. Half of the volunteers were allowed to drink water before the experiment, while the others ate salty pretzels, thus becoming very thirsty. The results showed that the thirsty volunteers estimated the water as being closer to them than volunteers who drank water earlier.
Our desire for certain objects may also result in behavioral changes. In a separate experiment, volunteers tossed a beanbag towards a gift card (worth either $25 or $0) on the floor, winning the card if the beanbag landed on it. Interestingly, the volunteers threw the beanbag much farther if the gift card was worth $0 than if it was worth $25 — that is, they underthrew the beanbag when attempting to win a $25 gift card, because they viewed that gift card as being closer to them.