Gauld, A., & Cornell, A. D. (1979). Poltergeists. Routledge Kegan & Paul.
Leading study from parapsychologists Gauld and Cornell first published in 1979. The researchers performed a cluster analysis on 500 published cases of hauntings and poltergeists spanning from the 9th through the 20th centuries. Of the total, 328 were poltergeist cases and 172 were haunting cases. Hauntings involved recurrent phenomena that were place-centered, persisting on/off for several years, often occurring at night. The principal activity in hauntings was "imitative noises." They took issue with conventional notions that poltergeist activity mainly arises from psychokinesis in living persons. (sponsored)
REFERENCE:
Gauld, A., & Cornell, A. D. (1979). Poltergeists. Routledge Kegan & Paul. Sponsored