The ideas of psi (precognition, psychokinesis and telepathy) violate well-established laws of physics. Geller uses conjuring tricks to simulate the effects of psychokinesis and telepathy. The book cites cases of automatic writing, hypnotism, mediumship, possession, psychokinesis, and telepathy. It is an introduction to theories of parapsychology, including extrasensory perception and psychokinesis. He has stated that psychokinesis and telepathy are potentially real. The program is so successful that Jobe develops psychokinesis and telepathy. Though he is not physically strong, Chiaotzu is skilled with psychokinesis and telepathy. Rhine's experiments into psychokinesis (PK) were not replicated by other scientists. Rhine's experiments into psychokinesis (PK) were also criticized. A 1952 study tested for experimenter's bias with respect to psychokinesis. Psychologist Daniel Wegner has argued that an introspection illusion contributes to belief in psychokinesis. Cognitive biases have been found in some cases of psychokinesis. PEAR conducted formal studies on two primary subject areas, psychokinesis (PK) and remote viewing. Krippner suggested no psychokinesis was involved; the effect was produced by an electrostatic charge. Believers in psychokinesis made errors that favored its existence, while disbelievers made opposite errors.