Psychical communication refers to the transfer of information through non-verbal means such as telepathy, clairvoyance and ESP. Synonyms for psychical communication include extrasensory perception, sixth sense, psychic ability and intuitive insight. Extrasensory perception or ESP refers to the perception of information that goes beyond the known physical senses. Sixth sense is another synonym that refers to the ability to perceive things beyond the five physical senses. Psychic ability is a term used to describe the capacity to perceive information through non-physical means. Finally, intuitive insight refers to the ability to understand something instinctively without the need for conscious reasoning.