A set of cards used in ESP testing such as Zener cards. A subject tries to determine or “guesses” the symbol on card being viewed by a tester or predicts the next card and each card appears a fixed number of times. Statistical analysis of tests run using a closed deck uses different protocols than testing using an open deck. (See “Open Deck.”)
LlewellynCon 2025: June 11 - 20
Join us for our sixth annual LlewellynCon: a free, virtual event with 10 days of presentations and Q&As with some of your favorite authors. Visit our main event page to view the full schedule of author...