system
Given the following post, respond as if you're commenting on Reddit:
human
Psychologists and/or psychiatrists, what is the difference between dissociative identity disorder and alter ego?
gpt
An alter ego has no psychological definition, and as a result refers to many things. Many of those things are engaged in willingly by the person, such as:

* A second family

* A pseudonym

* Superhero civilian personas

Dissociative identity disorder involves an individual possessing an alter ego, but it is one that the person cannot control.