“American Professor Charles H. Hapgood, reports in his excellent book, Voices of Spirit (1975) that he tested a medium to see if the electroencephalograph (EEG) of the medium Elwood Babbitt when out of trance would be different from when the medium’s mind was allegedly taken over and controlled by intelligences from the afterlife.
Hapgood took EEGs of Babbitt while three different intelligences were allegedly in control of the medium. The EEGs of each of the three were found to be completely different from each other and from the EEG of Babbitt not in trance. An EEG expert, Dr Bridge, noticed that the EEG’s were characteristic of people of different physical age and could not belong to the one person. Hapgood reproduces the EEG diagrams in his book (1975: 224-227).
These are only a few of a huge number of experiments which together comprise a substantial body of evidence” (Victor Zammit).