A Child Psychologist Was Asked to Provide Guidelines for Distinguishing

A child psychologist was asked to provide guidelines for distinguishing autistic disorder and childhood schizophrenia. Which of the following would be a helpful guideline for mental health professionals faced with making a differential diagnosis?

A) Childhood schizophrenia is more likely to run in families.
B) Childhood schizophrenia rarely occurs until age 7 or later.
C) Childhood schizophrenia is more likely to involve disordered speech.
D) Childhood schizophrenia tends to have a major impact on peer relationships.