An experiment conducted by the British Psychological Society in 2005 suggests that under the controlled condition of the experiment, people who claimed to be professional mediums do not demonstrate the mediumistic ability. In the experiment, mediums were assigned to work the participants chosen to be "sitters." The mediums claimed to contact the deceased who were related to the sitters. The research gather the numbers of the statements made and have the sitters rate the accuracy of the statements. The readings that were considered to be somewhat accurate by the sitters were very generalized, and the ones that were considered inaccurate were the ones that were very specific.
14. You feel the presence of Spirits – You sense that there *could* be a spirit, but you’re not sure. Maybe you feel like someone is watching you, but it’s just you and Fido hanging out, snacking on popcorn and watching Game of Thrones. You may feel a sudden wave of emotion, such as sadness or anxiety associated with the presence. (clairsentience)
^ Joseph Jastrow. (1935). Patience Worth: An Alter Ego in Wish and Wisdom: Episodes in the Vagaries of Belief. D. Appleton-Century Company. pp. 78–92. Lyon Sprague de Camp. (1966). Spirits, Stars, and Spells. New York: Canaveral. p. 247. Robert Goldenson. (1973). Mysteries of the Mind: The Drama of Human Behavior. Doubleday. pp. 44–53. Milbourne Christopher. (1970). ESP, Seers and Psychics. New York: Crowell. pp. 128–29
In 1876, William Eglinton was exposed as a fraud when the psychical researcher Thomas Colley seized a "spirit" materialization in his séance and cut off a portion of its cloak. It was discovered that the cut piece matched a cloth found in Eglinton's suitcase. Colley also pulled the beard off the materialization and it was revealed to be a fake, the same as another one found in the suitcase of Eglinton. In 1880 in a séance a spirit named "Yohlande" materialized, a sitter grabbed it and was revealed to be the medium Mme. d'Esperance herself. https://drive.google.com/file/d/1lYr1mAeAFjvGgB1s67WfKkkmi_T4SIzM/view?usp=sharing
The poet Robert Browning and his wife Elizabeth attended a séance on 23, July 1855 in Ealing with the Rymers. During the séance a spirit face materialized which Home claimed was the son of Browning who had died in infancy. Browning seized the "materialization" and discovered it to be the bare foot of Home. To make the deception worse, Browning had never lost a son in infancy. Browning's son Robert in a letter to The Times, December 5, 1902 referred to the incident "Home was detected in a vulgar fraud." The researchers Joseph McCabe and Trevor H. Hall exposed the "levitation" of Home as nothing more than his moving across a connecting ledge between two iron balconies.