In 1917, Edward Clodd analyzed the mediumship of the trance medium Gladys Osborne Leonard and came to the conclusion that Leonard had known her séance sitters before she had held the séances, and could have easily obtained such information by natural means.[119] The British psychiatrist Charles Arthur Mercier wrote in his book Spiritualism and Sir Oliver Lodge (1917) that Oliver Lodge had been duped into believing mediumship by trickery and his spiritualist views were based on assumptions and not scientific evidence.[120]
Mediumship became quite popular in the 19th-century United States and the United Kingdom after the rise of Spiritualism as a religious movement. Modern Spiritualism is said to date from practices and lectures of the Fox sisters in New York State in 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-19th century. Allan Kardec coined the term Spiritism around 1860.[12] Kardec claimed that conversations with spirits by selected mediums were the basis of his The Spirits' Book and later, his five-book collection, Spiritist Codification.
Knowing which questions to ask a psychic takes a little thought because the questions you think you want to ask will deliver little to no results. For example, passive questions like, "Will I ever get married?" "When will I meet my next boyfriend?" are impossible to answer because the future is not bound and determined. Instead, ask questions that can aid a current situation that could affect your life down the road - like marriage. A good example would be something like, "My partner and I seem to be hitting a wall. What are the most effective tactics for improving my relationship?" You also want to avoid questions that are begging for reassurance (Should I get divorced?) or that are full of doubt. Remember that standing up for yourself will get you farther than looking for a hand to hold. Instead, ask results-driven questions like, "Why am I no longer as connected with my partner now than when I was first married." The more precise you are with your questions, the better reading you will receive, so put a pen to paper before jumping on the phone.

^ M. Lamar Keene. (1997). The Psychic Mafia. Prometheus Books. p 122. ISBN 978-1-57392-161-9 "A medium still riding high in England is Leslie Flint, famed as an exponent of direct voice. William Rauscher and Allen Spraggett, who attended a sitting Flint held in 1970 in New York, said that it was the most abysmal flop of any seance they had endured. All the spirit voices sounded exactly like the medium and displayed an incredible ignorance of nearly everything pertaining to the sitters. The "mediumship " was second-rate ventriloquism."

In the late 1920s and early 1930s there were around one quarter of a million practising Spiritualists and some two thousand Spiritualist societies in the UK in addition to flourishing microcultures of platform mediumship and 'home circles'.[18] Spiritualism continues to be practised, primarily through various denominational Spiritualist churches in the United States, Canada, Australia and the United Kingdom. In the United Kingdom, over 340 Spiritualist churches and centres open their doors to the public and free demonstrations of mediumship are regularly performed.[19]