As it turns out, anyone whose hand is on the Ouija board pointer could be making it move without even knowing it. According to Dr. Scott G. Eberle of Psychology Today, there are two basic principles that get the Ouija board to work. First, the game is influenced by just how much each person playing is willing to suspend their disbelief of the unusual, improbable, or supernatural. The more someone leaves themselves open to believing the extraordinary, the more they unconsciously will it to happen.
Once that is factored in, it all becomes about something called the ideomotor effect: This is a phenomenon in which your body moves according to your unconscious will.