After all, the series is based on The Minds of Billy Milligan, a non-fiction book that details the story of the first person in the United States who was acquitted of a crime by pleading dissociative identity disorder.

Source: https://collider.com/the-crowded-room-trailer/

Another psychiatrist urged him to pursue therapy, however, and that therapy led to a diagnosis of dissociative disorder tracing back to childhood trauma.

Source: https://www.dailysignal.com/2023/04/10/transgender-hormones-surgery-made-life-worse-men-back-floridas-medicaid-rule-protect-others/?utm_source=rss&utm_medium=rss&utm_campaign=transgender-hormones-surgery-made-life-worse-men-back-floridas-medicaid-rule-pro

Dennis' design is not particularly terrifying as he just looks like a burly man; however, what makes this character stand out is his dissociative identity disorder.

Source: https://gamerant.com/outlast-characters-villains-scariest-horror/

His public defenders were the first lawyers who managed to successfully plead insanity on behalf of a defendant with dissociative personality disorder.

Source: https://decider.com/2023/06/10/the-crowded-room-apple-tv-plus-true-story/

I know it’s about a woman with dissociative identity disorder, but I think anyone can see themselves in her, because we are made up of so many different parts.

Source: https://www.huffingtonpost.co.uk/entry/toni-collette-interview-the-power-muriels-wedding-hereditary-oscars_uk_641b1c78e4b00c3e60774a19

Moon Knight is known for his dissociative identity disorder, but his latest personality is stolen from one of his oldest enemies.

Source: https://comicbook.com/comics/news/moon-knight-new-villain-identity-midnight-man/

Scientists refer to the “dissociative effects” of music, meaning that it helps to distract the mind from internal, fatigue-related symptoms.

Source: https://interaksyon.philstar.com/hobbies-interests/2023/12/28/183872/why-you-should-consider-adding-classical-music-to-your-exercise-playlist/

She continued: “He started doing these scenes, and Joe, in this dissociative state, it was sort of doubling anxiety-inducing because, on one hand, Marienne is desperate to get through to Joe.

Source: https://www.canindia.com/you-star-penn-badgley-morphed-into-a-whole-new-person-on-set-says-co-star/

They were interviewed three to seven days after discharge from the hospital and asked about dissociative experiences, such as forgetting who they were or feeling disconnected from themselves.

Source: https://www.dailymail.co.uk/health/article-12000189/Scientists-followed-ER-patients-year-survived-near-death-experiences.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

Where gets The Narrator's mental illness wrong is implying that the mundanity of his daily struggles triggered a mental break allowing the dissociative identity disorder to emerge.

Source: https://screenrant.com/movie-character-inaccurate-mental-illness-portrayals/