What are the symptoms for multiple personality disorder and how might one with it actk?

Missing time. If the person reports blocks of missing time, i.E: not remembering how one got somewhere or "what happened to this afternoon" it is suggestive for one of the dissociative disorders. An evaluation by a mental health professional is really important. Of course, being honest in the evaluation is also important.
It Varies. Nowadays this is called dissociative personality disorder. It is exceedingly rare. One would expect these people to have been seriously victimized during their early development. One would expect them to react with dissociation & depersonalization when challenged by a significant stressor. This is the feeling that you are not really there as if watching yourself in a movie.
See questionnaire. The dissociative experiences scale is a validated questionnaire that helps people identify the symptoms of multiple personality or other dissociative disorders.
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.

Related Questions

Can you tell me what are the symptoms of multiple personality disorder (disassociative identity disorder)?

MPD. Also referred to as Dissociative Disorder. Key Symptoms form the DSM-5 (manual used in diagnosing psychiatric disorders) include disruption of identity characterized by two or more distinct personality states, recurrent gaps in the recall of everyday events, important personal information, and/or traumatic events that are inconsistent with ordinary forgetting. Read more...
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. Read more...

Hi doctors, was just wondering what is multiple personality disorder and are there different forms of it?

A spectrum. Dissociation is a spectrum. It can vary from normal highway hypnosis where you've driven for a while and then suddenly come to and you can't remember having driven the past several miles, all the way to having full-blown multiple personality disorder which is referred to as dissociative identity disorder. In between is a large spectrum of conditions based on amnesia, repressed memories, feelings, sensations, smells, visualizations, tastes, and virtually any part of a traumatic experience that a person can push into the back recesses of their mind. Mild forms include what are called ego state disorders. More complex cases are called dissociative disorder not otherwise specified. There are also conditions such as depersonalization disorder which although being a form of dissociation does not have its roots in trauma. In extreme dissociation a person creates an alter ego or self that takes on the experiences that the person experienced as they were going through a significant trauma. This is called a split off part of the self. Because the trauma progresses, this split off part will likely split off another part that is identified with the aggressor. These parts tend to be disoriented to person place and time. They have separate wills identities and roles. Read more...
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. Read more...