ANNOUNCER: There are many methods to determine how humans think, a famous example is known as the Duncker problem. This involves giving a person a task; how to fix a candle to a wall using only matches and a box of thumbtacks. While seemingly strange, this task is specifically designed to force the participant to make some interesting decisions. After many repetitions of this study, it has been discovered that if you give the participant the tacks inside of the box, they generally won't consider the box as part of the materials they can use. And as a result, they are much less likely to reach the correct solution. If given the tacks in a box separately, the correct solution is achieved much more often.
Just another look into how humans perceive the world around them.