400
What is the main criticism towards multiple personality disorder?
The disorder is localized in time and space. Between 1930 and 1960, the number of MPD diagnoses in North America was 2 per decade. In the 1980s, when the DSM contained the first formal code for this disorder, the number of recorded cases exploded to 20,000. Additionally, the disorder is rare and/or virtually nonexistent in places outside the United States.