Pervasive Developmental is not something you can "catch". The best definition and explanation of Pervasive Developmental Disorder can be found under the WebMD website for those who need clarification. If like myself you are a parent of a child with this diagnosis it is a very trying condition to be able to understand. For example, my daughter who is now six years old is still in pull-ups due to the fact she is delayed in the potty training area due to her PDD. Children with PDD can exhibit various signs some might be mistaken or misconstrued as rude or arrogant.
However, in all actuality the child has trouble with communicating how he or she feels and why he or she feels the way they. They also have a hard time explaining why they do or don't do things depending on the situation in which the child is placed. My daughter never wanted to participate with her peers in kindergarten while in a group of twenty five children. Now, my daughter is in first grade and opening up more and expressing how she feels. When a child with PDD shuts down or has what parents see as a temper tantrum the worst thing you can do is get angry with that child. That could make the child act out more. I have learned what will or will not make my daughter react in either a positive or negative manner.
There are five various forms of PDD:
3.Childhood Disintegrative Disorder
5 PDDNOS(Pervasive Developmental Disorder not otherwise specified)
If you want to know the various symptoms of PDD please look on the WebMD website.
If after reading the link which I provided and you feel that your child is exhibiting some of these behaviors or signs the best thing to do is get a medical evaluation with someone that is trained in understanding this disorder. Don't just go by what the child's school tells you because their diagnosis could be different from a trained medical professionals point of view or diagnosis.
A school psychologist will diagnose the child on an academic level, but having a medical professionals prospective to confirm or deny the school psychologists point of view is a good idea. The school systems leave it up to the parents to get a second opinion to determine if medications may be needed to assist their child. From a parents prospective of a child with this diagnosis...my opinion and advice to you is follow your heart.
If you do not feel comfortable with the schools diagnosis follow up with a medical provider like I have previously mentioned so they can ease your fears and answer any questions you may have .. One final note, a child with PDD is just like any child so please don't treat them as though they are "different" treat a PDD child with the same love ,tenderness and respect that a child who is deemed in societies terms as "normal". Help the child open up and help the child use words to express what it is they are going through so that you can help them deal with the situation.