The James McAvoy starrer "Split" has been getting good reviews on Rotten Tomato and from critics. However, not all are fans of the M. Night Shyamalan movie. There were also negative reviews surrounding the movie; mainly on its depiction of dissociative identity disorder.

"Split" is about a man with a mental health disorder known as dissociative identity disorder, or previously known as multiple personality disorder. Apparently, the man has 23 distinct identities living inside him. One of these personalities came to light and abducted three girls whom he imprisons in his basement.

James McAvoy did an impressive job of creating different characters, with "Barry" as the dominant personality and more of the artistic and rather normal character. "Dennis," who abducted the girls, had more of a violent nature and has obsessive compulsive disorder. There was even a woman named "Patricia" and a 9-year-old named "Hedwig." All of these were McAvoy alone.

According to AV Club, M. Night Shyamalan did say that "Split" shared the same universe with his memorable 2000 film entitled "Unbreakable." In a way, the former was a semi-sequel of the latter.

With the positive review of "Split," he went on to say that a sequel to the movie is possible. Shyamalan said that he would bring back characters from both movies for the sequel. So, what did James McAvoy say about this?

Apparently, the "Split" star is open to making a sequel, but only "if it's good material." Also, he doesn't really care whether it was a sequel of "Split" or that of "Unbreakable." So long as he's able to work with "good people" and "do interesting things," he is up for it.

On the other hand, negative criticism surrounding the movie's depiction of mental health disorder also emerged. In fact, several petitions on canceling "Split" gained thousands of signs and support. One of the most popular was from an 18-year old with DID.

"The purpose of this petition is to ask the people involved in this movie to have the actors create a PSA letting people know that violence in people with DID is very rare and that we are not killers," creator of petition Amelia Joubert wrote according to The Lantern. Another petition said that mental illness conversations were being reduced to "horror movie trope."

M. Night Shyamalan reacted to this by saying that people who have seen the movie had zero issues. McAvoy, meanwhile, did say he was not able to speak with someone with DID. Instead, he watched diaries of people with DID on Youtube.