Wild card (cards) Wild card (cards) A wild card in card games is one that may be used to represent any other playing card, sometimes with certain restrictions. These may be jokers, for example in Rummy games, or ordinary ranked and suited cards may be designated as wild cards ("deuces wild" in Poker is a common variant). A card which is not wild may be referred to as a natural card. In most cases, the wild card or cards must be agreed upon by all players before the cards are dealt and play commences. There are two common rules regarding wild cards: "fully
Zener cards the experimenter picks up a card in a shuffled pack, observes the symbol, and records the answer of the person being tested, who would guess which of the five designs is on the card. The experimenter continues until all the cards in the pack are tested. Poor shuffling methods can make the order of cards in the deck easier to predict and the cards could have been inadvertently or intentionally marked and manipulated. In his experiments, J. B. Rhine first shuffled the cards by hand but later decided to use a machine for shuffling. In his book, "The New Apocrypha",