History

Attempts to communicate with the dead and other spirits have been documented back to early human history. One of the most well-known is the story Witch of Endor, who was said to have raised the spirit of the deceased prophet Samuel to allow the Hebrew king Saul to question his former mentor about an upcoming battle, as related in the First Book of Samuel in the Jewish Tanakh.

Mediumship became quite popular in the United States after the rise of Spiritualism as a religious movement. Modern Spiritualism is said to date to the mediumistic activities of the Fox sisters in New York state 1848. The trance mediums Paschal Beverly Randolph and Emma Hardinge Britten were among the most celebrated lecturers and authors on the subject in the mid 1800s. Mediumship was also described by Allan Kardec, who coined the term Spiritism, around 1860.

After the exposure of the fraudulent use of stage magic tricks by physical mediums such as the Davenport Brothers, mediumship fell into disrepute, although it never ceased being used by people who believed that the dead can be contacted.

From the 1930s through the 1990s, as psychical mediumship became less practiced in Spiritualist churches, the technique of channelling gained in popularity, and books by channellers who related the wisdom of non-corporeal and non-terrestrial teacher-spirits became best-sellers amongst believers.

Spirit Guides

For some mediums, a spirit guide is a highly evolved spirit with the sole purpose of helping the medium develop and use their skills. They assist mediums in following their spiritual path. For other mediums, a spirit guide is one who brings other spirits to a medium's attention or carries communications between a medium and the spirits of the dead. Many mediums claim to have specific guides who regularly work with them and "bring in" spirits of the dead. Some mediums believe that spirits of the dead will communicate with them directly without the use of a spirit guide. The relationship between the medium and the guide may be providential, or it may be based on family ties. In 1958, the English-born Spiritualist C. Dorreen Phillips wrote of her experiences with a medium at Camp Chesterfield, Indiana: "In Rev. James Laughton's séances there are many Indians. They are very noisy and appear to have great power. [...] The little guides, or doorkeepers, are usually Indian boys and girls [who act] as messengers who help to locate the spirit friends who wish to speak with you." Then, describing the mediumship of Rev. Lillian Dee Johnson of Saint Petersburg, Florida, she noted, "Mandy Lou is Rev. Johnson's guide. [..] She was, on earth, a slave to Rev. Johnson's grandmother."

Mental Mediumship

“Mental mediumship" is communication of spirits with a medium by telepathy. The medium mentally "hears," "sees," and/or feels messages from spirits, then, directly or with the help of a spirit guide, passes the information on to the message's recipient(s). When a medium is doing a "reading" for a particular person, that person is known as the "sitter."

Trance Mediumship

Trance mediumship is often seen as a form of mental mediumship.

Some mediums remain conscious during this communication period, while others go into a trance, wherein a spirit uses the medium's body to communicate. Trance mediumship is defined as a spirit taking over the body of the medium, sometimes to such a degree that the medium is unconscious. Part trance mediums are aware during the period of communication, while full trance mediums pass into an unconscious state in which their physical and mental processes are completely controlled by the spirit communicator.

In the 1860s and 1870s, trance mediums were very popular. Spiritualism had attracted adherents who had strong interests in social justice, and many trance mediums delivered passionate speeches on abolitionism, temperance, and women's suffrage.

Because the typical trance medium has no clear memory of the messages conveyed while in a trance, a medium of this type generally works with an assistant who writes down or otherwise records his or her words. A good example of this kind of relationship can be found in the early 20th century collaboration between the trance medium Mrs. Cecil M. Cook of the William T. Stead Memorial Center in Chicago (a religious body incorporated under the statutes of the State of Illinois) and the journalist Lloyd Kenyon Jones, a non-mediumistic Spiritualist who transcribed Cook's messages in shorthand and then edited them for publication in book and pamphlet form.

Physical Mediumship

Physical mediumship is defined as manipulation of energies and energy systems by spirits.

 Physical mediumship may involve perceptible manifistations such as loud raps and noises, voices, materialized objects, apports, materialized spirit bodies, or body parts such as hands, and levitation. The medium is used as source of power and substance for such spirit manifestations. This is sometimes said to be accomplished using the energy or ectoplasm released by a medium.

Most physical mediumship is presented in a darkened or dimly lit room, and most physical mediums make use of a traditional array of tools and appurtenances, including spirit trumpets, spirit cabinets, and levitation tables.

Channeling

There are two main techniques mediumship developed in the latter half of the 20th century. One type involves psychics or sensitives who can speak to spirits and then relay what they hear to their clients. One of the most noted channels of this type is clairvoyant Danielle Egnew, known for her communication with angelic entities.

The other incarnation of non-physical mediumship is a form of channeling in which the channeler goes into a trance, or "leaves their body" and then becomes “possessed” by a specific spirit, who then talks through them. In the trance, the medium enters a cataleptic state marked by extreme rigidity. The control spirit then takes over, the voice may change completely and the spirit answers the questions of those in its presence or giving spiritual knowledge. The most successful and widely known channeler of this variety is JZ Knight, who claims to channel the spirit of Ramtha, a 30 thousand year old man. Others claim to channel spirits from "future dimensional", ascended masters  or in the case of the trance mediums of the Brahma Kumaris, God himself. Channeling is popularly parodied in the "Doonesbury" cartoon where a ditzy female character is occasionally taken over by "Hunk-Ra," an assertive 21,000-year-old warrior based on Ramtha. Other notable channels are Jane Roberts for [Seth], Margaret McElroy for [Maitreya] and Serge J. Grandbois for [Kris].

Psychic Senses

In Spiritualism, psychic senses used by mental mediums are sometimes defined differently than in other paranormal fields. The term clairvoyance, for instance, may be used by Spiritualists to include seeing spirits and visions instilled by spirits, whereas the Parapsychological Association defines "clairvoyance" as information derived directly from an external physical source.

Clairvoyance or "Clear Seeing", is the ability to see anything which is not physically present, such as objects, animals or people. This sight occurs "in the mind’s eye", and some mediums say that this is their normal vision state. Others say that they must train their minds with such practices as meditation in order to achieve this ability, and that assistance from spiritual helpers is often necessary. Some clairvoyant mediums can see a spirit as though the spirit has a physical body. They see the bodily form as if it were physically present. Other mediums see the spirit in their mind's eye, or it appears as a movie or a television program or a still picture like a photograph in their mind.

Clairaudience or "Clear Hearing", is usually defined as the ability to hear the voices or thoughts of spirits. Some Mediums hear as though they are listening to a person talking to them on the outside of their head, as though the Spirit is next to or near to the medium, and other mediums hear the voices in their minds as a verbal thought.

Clairsentience or "Clear Sensing", is the ability to have an impression of what a spirit wants to communicate, or to feel sensations instilled by a spirit.

Clairsentinence or "Clear Feeling" is a condition in which the medium takes on the ailments of a spirit, feeling the same physical problem the spirit person before they died.

Clairalience or "Clear Smelling" is the ability to smell a spirit. For example, a medium may smell the pipe tobacco of a person who smoked during life.

Clairgustance or "Clear Tasting" is the ability to receive taste impressions from a spirit.

Claircognizance or "Clear Knowing", is the ability to know something without receiving it through normal or psychic senses. It is a feeling of "just knowing". Often, a medium will claim to have the feeling that a message or situation is "right" or "wrong."