Several methods for subconsciously prompting or influencing someone to name a particular card have been devised. (Here we exclude lists of cards believed to be psychologically preferred by the public, which are covered in Mental Card Force by Probability.)

In Greater Magic (1938), the idea is mentioned of flashing the bottom card of the deck to someone, after which he is asked to name a card. Having recently seen the bottom card, although he may not consciously remember doing so, it will be more readily named than others. See the first complete paragraph on p. 559.

Orville Meyer, in “To Do a Miracle”, suggests that previously having the same card physically chosen (forced) several times will persuade the person who has repeatedly chosen the card to later name that card when asked to think of one. See The Jinx, No. 68, Nov. 25, 1939, p. 470.

Arthur Carter psychologically forces the Seven of Diamonds through combined strategies. He ribbon spreads the deck face up, more prominently exposing the Seven in the spread. He then provides instructions for someone to think of a card, those instructions being designed to steer the person subtly into thinking of the Seven of Diamonds. See “The Psychic Seven” in Pentagram, Vol. 7 No. 5, Feb. 1953, p. 42.