Ouji boards?

Have your friends use a ouija board, but blindfold them. Try the blindfold method on yourself first, to make sure you can't see anything. You can tell them it's just to make sure the spirits are directing the planchette (the little triangular-ish thing), and not they themselves moving it - which is true.

Now, before they start, SECRETLY turn the ouija board upside down. Watch as they move the planchette, subconsciously, to the area where the letters normally would be... but which is now just an empty area, or the (now upside-down) numbers.

For best results, have them ask yes or no questions, then watch as they move the planchette to the empty space where "Yes" or "No" would have been before you turned the board upside down.

What conclusion can we draw from this?