As a new BBC drama, May 33rd is screened Woman's Hour considers the controversial diagnosis of Dissociative Identity Disorder. Mostly affecting women, it used to be called Multiple Personality Disorder - but what exactly is it?
John Morton, Professor of Psychology at the Institute of Cognitive Neuroscience, and Dr Alice Parshall, Consultant Psychiatrist and Clinical Director, West London Mental Healthcare Trust join Jenni to discuss what might cause DID, and what its status as a diagnosis is today.