One of the prominent features of autism spectrum disorder (ASD) is impaired communication. However, most diagnoses of ASD happen after the child is more than 3 years old.
Children with autism spectrum disorder (ASD) often have delayed development in communication and language. This impaired development can be present even in the first year of their lives.
Early in life, children are not capable of filling out a complete questionnaire or talking to an interviewer.
In infancy you can observe an explosive growth. A lot of researchers focus on this age group and observe parent-infant dyads to get more insight in specific behaviors.