Most of what happens in The Haunting can be explained as psychological, though I'd agree that that is more true in the novel.
All are post-"Turn of the Screw" so the supernatural is alluded to rather than trotted out in the open. Having just re-read The Werewolf of Paris recently, I was surprised to find it true of that novel, too; which wasn't my recollection of it.
Agreed. I just think your line has some dashes in it.Yes, some movies blur the lines but the lines are still there, it's up to each of us to decide where we draw them.