OK, so I finally went to search for the authenticity of the study mentioned by Ray during the Ray’s Occult scene in GB2. I found this: http://undergraduatedean.duke.edu/2009/06/the-ghosts-of-dukes-past/
Seems that it was no fluke, Jennifer!
Quite interesting. I hadn’t seen this posted before, so I thought I’d share. There is more too, if you google.