“Your mother's in here, Karras. Would you like to leave a message? I'll see that she gets it.”
― Pazuzu, 'The Exorcist' (1973)
After combing through movie lists from IMDB to Reddit, I think I've created the most complete collection of horror movies that climb inside your skull and mess with your brains.
Some people claim that the benchmark of true psychological horror is that the truly petrifying aspect is what isn't shown, not necessarily what is. But I've also included horror films that rely on the wholesale disintegration of the human psyche, and films where characters begin to lose faith in what is strictly real.
Beginner's Guide: Psychological Horror, via Film Inquiry:
What Exactly Is a "Psychological" Horror Film?, via PopMatters:
Why 'The Shining' is the Best Psychological Horror Film Ever, via The Tangential:
Why We Crave Horror Movies (PDF), via Stephen King:
Common Themes in Psychological Thrillers, via The Artifice:
Death, Grief & Why Horror Films Matter, via Talkhouse:
The Psychology of 'Annihilation', via Storytellers:
Psychological Thriller ‘Oculus’ Challenges Perceptions Of Horror Genre, via The Heights:
Psychological Horror in the Films of David Lynch, via film-o-holic: