10. Card-Guessing Experiments Need to improve your Poker game? A famous Duke University experiment on telepathy, led by the scientist J.B. Rhine, used a specially designed deck of 25 cards, with each card having one of five symbols on one size: a cross, star, wavy lines, circle and square. In one set of experiments, 2,400 total guesses were made and an excess of 489 correct guesses were noted. The statistical probability of this outcome is equivalent to odds of 1,000,000 to 1, showing clear evidence that “something definitely occurred” in the parapsychological realm.