I find this idea very interesting. From the article you quoted:
A split personality is a popular term for DID. In the past, DID was known as multiple personality disorder.
People with DID have
two or more distinct personalities. They do not present as simple changes in traits or moods. A person with DID expresses significant differences between these alternate identities, which can also be referred to as
alters.
Often, these personalities are completely different from each other. These fragmented personalities take control of the person’s identity for some time.
A person also maintains their primary or host identity, which is their original personality, and will answer to their given name. Their primary identity is
generally more passiveTrusted Source, and they may be unaware of the other personalities.
When a personality change happens, the new personality will have a distinct history, a new identity, and different behaviors.
These split personalities, or alters, often have their own distinct:
- name
- age
- gender
- moods
- memories
- vocabulary