Ideomotor Effect

This is another effect caused by being human, amplified by having supernatural beliefs. In short, the Ideomotor effect is when someone moves a muscle unconsciously, such that they do not realize they are doing it. It is the cause of some of the major supernatural phenomenon that are popular these days.

Dowsing
When dowsing, the subject holds two rods, usually metal, and in a way that will allow them both a full range of motion with as little friction as possible. When the two rods cross, it is supposed to indicate that there is water there. How far down, how much there is, how much rock there is between the water and the surface, and how healthy the water are factors that seem to not concern the spirits or forces that cause the rods to meet. The reason these rods meet is that the holder unconsciously moves the muscles, and if they happen to move in a way that the rods meet, they proclaim there is water.

Facilitated communication/Ouija boards
Facilitated communication is a process where someone with training takes hold of a person that would normally have little to no ability to communicate (Coma, autism, mentally retarded) in the same way that several people grasp the piece of wood on an Ouija board, and have the spirits send them a message. In the former case, if you place a blind between the nurse and the keyboard on which the answers are typed, the outcome will be gibberish. In the latter case, if you blindfold all the participants and rotate the board, the spirits will guide them to where they think the answers are located on the board.

With facilitated communication, the family members of the afflicted are led to believe that the afflicted have some incredible intelligence, and for a small fee, can communicate and see the amazing knowledge the afflicted possess. Which is even more amazing when given the fact that much of the time, the afflicted cannot even see the keyboard, much less give signs of even comprehending the fact there is someone holding their hand. Even more intriguing is the fact that when the nurses are changed for a single patient, each time, the afflicted develop a new personality.