Question

Why was multiple personality disorder renamed?

Answer 1

Dissociative Identity Disorder (DID) also known as Multiple Personality Disorder (MPD) was changed to such because as people have become more aware of what this disorder truly means - there have been some major changes. 

When you hear the word personality you reflect upon the individual's actions, behavior, mood, etc. A patient with DID lacks one way of acting, they circulate throughout multiple personalities. 

A reason for changing this is to highlight that the problem is not multiple personalities, it's the fact they do not possess a unified one.

Hope this helps!