Partly. While the core elements of Sybil were based on real experiences, some aspects might have been dramatized or fictionalized for the sake of the narrative.
Yes, it is. It's really interesting to read about Sybil's different personalities and how they interact. It gives you a unique perspective on the human mind.
The book 'Sybil' is about a real - life situation of a woman with dissociative identity disorder (formerly known as multiple personality disorder). It shows how Sybil's different personalities were formed, likely as a result of severe childhood trauma. It was ground - breaking as it brought this complex mental condition to the public's attention and also detailed the therapeutic process she went through to try and integrate her personalities.
The movie Sybil is indeed inspired by a true story. It depicts the struggles and experiences of a woman with multiple personality disorder based on actual events.