What are the symptoms of multiple personality disorder?

Lapse in time/attn: Dissociative identity disorder is extraordinarily rare and typically associated with severe trauma in early childhood which results in a fractioning of the personality. Symptoms would include drastically different personality types (observed by others) and lost periods of time while one personality is functioning typically the other(s) are dormant, lapses in attention and focus.

Multiple personality: MPD, now called dissociative identity disorder is characterized by two or more distinct identity states known as alters in addition to the patient him/her self. These identity states will seem fragmentary and partially unaware of the others, each with varying degrees of disturbance, The alters tend to be more active and aggressive, while the patient's core personality will be more passive.