What are pervasive developmental disorders?
Q: What are pervasive developmental disorders?
A: Pervasive developmental disorders (PDD) are a group of disorders that slow down a child's rate of learning to talk and listen to others, and cause other problems.
Q: How many disorders are there in the PDD group?
A: There are five disorders in the PDD group.
Q: What are the five disorders in the PDD group?
A: The five disorders in the PDD group are Pervasive disorder not otherwise specified (PDD-NOS), Autism, Asperger Syndrome, Rett syndrome, Childhood disintegrative disorder (CDD).
Q: Which disorders are also called autism spectrum disorders?
A: The first three disorders in the PDD group, Pervasive disorder not otherwise specified (PDD-NOS), Autism, and Asperger Syndrome are also called autism spectrum disorders.
Q: When do the signs of PDD usually appear?
A: Signs of PDD usually appear before the child is three years old.
Q: Can PDD be identified in babies by their parents?
A: Yes, a child's parents might begin to notice signs of PDD when the child is a baby.
Q: Are the last two disorders in the PDD group common?
A: No, the last two disorders in the PDD group, Rett syndrome and Childhood disintegrative disorder (CDD), are not common.
