Psychological Horror movies are more about the characters’ state of mind than some outside terrorizing force. To be fair, those outside forces are often present, but the filmmaking is more interested in the emotional and mental fallout.
The movie considered by many the best in this sub-genre is Roman Polanski’s 1965 Repulsion, the director’s first English-language film. Repulsion stars a chilly Catherine Deneuve as a woman pathologically averse to the leering presence of men. Hiding in her apartment, beset by increasingly disturbing hallucinations, she descends into murderous madness.
Meet Me In Montauk 