ESP is an alleged ability to acquire information by means other than the five main senses of taste, sight, touch, smell, and hearing. The term implies sources of information unknown to science. Types of ESP include clairvoyance, aura reading, telepathy, and astral projection. The study of such phenomena is often dubbed “parapsychology.” Zener cards were a common research tool for parapsychologists in the early 20th century. What is drawn on each card, and how are they used? Discuss
Source: The Free Dictionary