Paranormal Society for Psychical Research (SPR) members
Maurice Grosse and
Guy Lyon Playfair reported: "curious whistling and barking noises coming from Janet's general direction." Although Playfair maintained the paranormal activity was genuine and wrote in his later book
This House Is Haunted: The True Story of a Poltergeist (1980) that an "entity" was to blame for the Enfield disturbances, he often doubted the children's veracity and wondered if they were playing tricks and exaggerating. Still, Grosse and Playfair believed that, even though some of the alleged
poltergeist activity was faked by the girls, other incidents were genuine. Other paranormal investigators who visited the Enfield house included American
demonologists
Ed and Lorraine Warren, who were convinced that the events had a supernatural explanation. According to
Brian Dunning, the Warrens' visit was short: "Ed Warren tried to persuade Playfair that money could be made from this case by writing books and selling movie rights; and then the Warrens left". Grosse had observed Janet banging a broom handle on the ceiling and hiding his tape recorder. Psychical researcher
Renée Haynes noted that doubts were raised about the alleged poltergeist voice at the SPR conference at
Cambridge in 1978, where videocassettes from Enfield were examined. SPR investigator
Anita Gregory stated the Enfield case had been "overrated", characterising several episodes of the girls' behaviour as "suspicious" and speculated that the girls had "staged" some incidents for the benefit of journalists seeking a
sensational story. In the first edition of the BBC series
Hauntings, broadcast on 13 October 2024, it was revealed that the unexplained voice of "Bill Wilkins" was later played on an
LBC radio talk show, featuring Maurice Grosse. A listener to the show identified the voice as that of his father, William Charles Wilkins, who had lived at the house, had gone blind, had suffered a haemorrhage and had died in a chair downstairs, on 20 June 1963.
Other Milbourne Christopher, an American stage magician, briefly investigated the Enfield occurrences and failed to observe anything that could be called paranormal. He was dismayed by what he felt was suspicious activity on the part of Janet, later concluding that "the poltergeist was nothing more than the antics of a little girl who wanted to cause trouble and who was very, very clever." Ventriloquist
Ray Alan visited the house and concluded that Janet's male voices were simply vocal tricks. ==Sceptical interpretations==