The onset of autism spectrum disorder is always before the age of
A) 1
B) 2
C) 3
D) 4
Question 2
Diagnostic criteria for autism spectrum disorder change as research provides more information on the symptoms and causes. Which of the following has been a result of this?
A) decrease in diagnosis of autism spectrum disorders
B) increase in incidence of autism spectrum disorders
C) decrease in incidence of autism spectrum disorders
D) increase in diagnosis of autism spectrum disorders