A basic form of ESP testing. It uses a deck of cards (such as regular playing cards or Zener cards) and repeated rounds of testing. This technique can be used to test for precognition, by having the subject guess a card before it is revealed, telepathy, by having the subject guess a card being looked at by the tester, etc.
Readers, please enjoy this guest blog post by Rick de Yampert, author of the new Crows and Ravens.
I was gobsmacked the time I looked out my living room window at the woods behind my Palm Coast, Florida, home and saw a crow hanging upside-down in...