I live in Indiana, and find it strange they have no recommended age for home alone yet, they do have an age requirement as to when a child can be left in the care of a sibling child, and that age is 11.
However, dissociative identity disorder is a severe form of dissociation, a mental process which produces a lack of connection in a person's thoughts, memories, feelings, actions, or sense of identity. Dissociative identity disorder is thought to stem from a combination of factors that may include trauma experienced by the person with the disorder.
Dissociative identity disorder was initially named multiple personality disorder (MPD). Regardless of whether the disorder is termed dissociative identity disorder or multiple personality disorder, it is in no way related to schizophrenia. Although schizophrenia and multiple personality disorder are commonly linked in the minds of lay people, it is a misconception.