Channelling - The process of bringing information and ideas through from the spirit world to the physical world

Trance Mediumship - Where the medium goes into a trance like state and allows a spiritual being the ability to communicate using their body. They are not "taking over" or "possessing", just using the trance channel's facilities for the time of the communication

Clairvoyance - The ability to see the message or event

Clairaudience - The ability to hear the message or idea being given

Clairsentience - The ability to 'sense' or 'know' something

Parapsychology - The study of the paranormal and higher dimension realms

Medium/Channel - A person who is the intermediary between the spirit world and the physical world