I’m confused (spoilers)

I’m very familiar with multiple personalities as it’s in my family. The doctor says the siblings are his multiple personalities. Yet the siblings are real and were murdered. That is not how multiple personalities work.

When it comes to multiple personalities they are created in order to help a young child over come traumatic experiences.

For example a little girl is molested by her father. She is so young she mentally escapes from the events and a stronger personality is created to take the abuse instead of her. This can often cause the child anger about the abuse so another personality is developed to handle the anger in the child’s life. Another common personality is a child who succeeds at school. The school is an escape from the abuse. Over the years as the girl grows it’s possible more personalities develop.

It is most common for people with multiple personalities to not even be aware of the others. One moment the “real person” is watching a tv show and then for them a second later they are suddenly in another place. This is called loss of time. I know someone who lost months of her life because of this. Sometimes there are those who know they are a multiple and there are usually personalities that take care of all the rest. They make sure the body maintains hygiene, eats their meals and get a good night sleep. These are called the caretakers.

Anyway my point is this movie does not portray the mental illness very well at all.