The experiments Tony Cornell conducted to explore eyewitness testimony of ghosts, as reported in the SPR's Journal, are discussed in a new article, 'The Strange Tale of an X-rated Haunting':
http://www.bbc.com/future/story/20161024-the-strange-tale-of-an-x-rated-haunting
Previous articles discussing these experiments can be found here:
and here:
http://tomruffles.blogspot.co.uk/2010/05/tony-cornell-and-cambridge-cinema-ghost.html