Psychologists have known for a long time what seems pretty obvious intuitively: that given two routes to achieve the same reward, a person will take the easier path.
But Not TWO Miles...
For example, if you were to ask a person to walk a mile to get a thick, juicy steak or ask them to walk two miles to get the same thick, juicy steak, it’s pretty obvious that most people would take the easier way to the food.