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.

What is the difference between DID and multiple personality disorder?

A major difference is that someone with DID has two or more distinct identity states, sometimes known as alternate identities, or alters. This is not present in schizophrenia. DID was formerly known as multiple personality disorder or split personality disorder, but clinicians no longer use these terms.

What is split personality called now?

Dissociative identity disorder (previously known as multiple personality disorder) is thought to be a complex psychological condition that is likely caused by many factors, including severe trauma during early childhood (usually extreme, repetitive physical, sexual, or emotional abuse).