NEW YORK, Nov 24 — In the 1970s, the TV movie 'Sybil' introduced much of the nation to multiple personality disorder and led to a controversy that continues to shape mental health issues. — New York Times

Shirley Mason, who later became known as Sybil, was the subject of study in multiple personality disorder, which eventually led to it being recognised as a mental health problem.
Shirley Mason, who later became known as Sybil, was the subject of study in multiple personality disorder, which eventually led to it being recognised as a mental health problem.