The first international study into paranormal experiences was launched in the vaults of the capital's Nicol Edwards pub, with experts keen to hear the nation's spookiest tales.
Professor Richard Wiseman from the University of Hertfordshire is involved in a project into the psychology of the paranormal. Asked if he believes in ghosts, he replied: "I am a bit of a sceptic. I think there has to be a scientific explanation for most things."
He added: "Over the years we have carried out a number of investigations in vaults around Edinburgh with tales of people feeling a presence, hearing footprints, seeing shadows."
In 2001 Mr Wiseman was involved in a ten-day study of the Edinburgh Castle vaults, which involved some 240 members of the public. The team used scientific equipment to measure phenomena including temperature, magnetic fields and light levels.
Tests took place in vaults which had a reputation for being haunted and others that did not. Although those involved were unaware which was which, they reported strange results from the chambers that were reputedly haunted.
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