Spiritualists reacted with an uncertainty to the theories of evolution in the late 19th and early 20th century. Broadly speaking the concept of evolution fitted the spiritualist thought of the progressive development of humanity. At the same time however, the belief in the animal origins of humanity threatened the foundation of the immortality of the spirit, for if humans had not been created by God, it was scarcely plausible that they would be specially endowed with spirits. This led to spiritualists embracing spiritual evolution.[61]
The exposures of fraudulent activity led to a rapid decline in ectoplasm and materialization séances.[199] Investigator Joe Nickell has written that modern self-proclaimed mediums like John Edward, Sylvia Browne, Rosemary Altea and James Van Praagh are avoiding the Victorian tradition of dark rooms, spirit handwriting and flying tambourines as these methods risk exposure. They instead use "mental mediumship" tactics like cold reading or gleaning information from sitters before hand (hot reading). Group readings also improve hits by making general statements with conviction, which will fit at least one person in the audience. Shows are carefully edited before airing to show only what appears to be hits and removing anything that does not reflect well on the medium.[200]
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