how do these patients communicate with each other?
About a third to a half of individuals with autism do not develop enough natural speech to meet their daily communication needs.
Autism
About a third to a half of individuals with autism do not develop enough natural speech to meet their daily communication needs. 
who played kate winslet's mom in titanic Frances Louise Fisher is kate an actress? Yes, she is which film was her breakthrough? "Heavenly Creatures" which film fetched her the stardom? "Titanic" who was the male protagonist of this film? Leonardo Dicaprio what else she is involved in other than acting? Winslet supports several charities and causes. She also wrote a book about autism what is this last mentioned term? Autism is a developmental disorder characterized by difficulties with social interaction and communication, and by restricted and repetitive behavior.
wiki:1545104
Autism [SEP] Communication
About a third to a half of individuals with autism do not develop enough natural speech to meet their daily communication needs. Differences in communication may be present from the first year of life, and may include delayed onset of babbling, unusual gestures, diminished responsiveness, and vocal patterns that are not synchronized with the caregiver. In the second and third years, children with autism have less frequent and less diverse babbling, consonants, words, and word combinations; their gestures are less often integrated with words. Children with autism are less likely to make requests or share experiences, and are more likely to simply repeat others' words (echolalia) or reverse pronouns.