Mentalism is a performing art in which its practitioners, known as mentalists, appear to demonstrate highly developed mental or intuitive abilities. Performances may appear to include hypnosis, telepathy, clairvoyance, divination, precognition, psychokinesis, mediumship, mind control, memory feats and rapid mathematics. Mentalists are sometimes categorised as psychic entertainers, although that category also contains non-mentalist performers such as psychic readers and bizarrists.