Size Constancy

Size constancy is when we infer the size of an object based on its distance and size in our retinas. A great example of this can be found as you are walking down the street in your neighborhood. You may see a car from a distance and although it appears smaller from afar, you know its size or even the amount of people it would be able to fit. If something is far away, we automatically and unconsciously assume its size. As seen in this photo, the cars on both the left and right appear small but we perceive them as the size of a normal truck and sedan.