Split is the latest horror film to misunderstand why mental illness is terrifying - The Verge

Horror that understands its antagonists isn’t just more sensitive, it’s scarier.

What 'Split' gets wrong about dissociative identity disorder

Creepy Good - TV Tropes

Horror on the brain: Finnish researchers map mental impact of

How Scary Is 'Split'? The Film Could Be M. Night Shyamalan's Most