In two cases, classic speaking in a language unknown to the patient (as told by himself and family), as well as supposed visions or premonitions that actually ended up happening, again according to family. The problem here is that many of the “signs and symptoms” of possession can be explained in some sort of way, which is why I agree that the challenge is to differentiate between DID and possession. We also had people that claimed to be visited by demons (a succubus was brought up at one point), though I think those are more psych and less actual demonic.
I wonder if there are a lot of cases of possession in children? I agree, the personality of children is not fully established, so the concept of alters might make more sense (or at least be more acceptable) for children, and possibly wouldn’t be considered a sign of possession but just “kids being kids, they’ll grow out of it”. Would that make claims of possession less frequent in children than adults? Hmmm…
You may be interested in a popular book called “
The Rite”. It’s a book about an American Catholic priest that goes off to Rome to go to, basically, a School of Exorcism. It’s really interesting, and shows how quite a few people that go for an exorcism aren’t the stereotypical types that you see in movies like The Exorcist, and some of these people actually go back and back for more exorcisms, like if it’s their family practitioner! That’s where I begin to think that not all exorcisms are really dealing with demons, but are placebos to help some deal with whatever problems they have.