Disability Tax Credits and Benefits for Pervasive Developmental Disorder (PDD)


Pervasive Developmental Disorders (PDD’s) refer to a specific category of five disorders that are characterized by the difficulty and delay of development of the functions of the human brain regarding socialization and communication. The five disorders are Pervasive developmental disorder not otherwise specified (PDD-NOS), autism, Asperger’s syndrome, Rett syndrome, and Childhood disintegrative disorder. These disorders are based in the inability for patients to effectively communicated and socialize with other patients and people, exhibiting difficulty talking and interacting.

Primarily, pervasive developmental disorders impact children very strongly, as issues like CDD, autism, and Asperger’s affect many young people in the United States and Canada, and are often known as being on the autism spectrum disorder of diseases and issues known to affect children and other people.


The causes of PDD’s are highly debated by the medical profession, and there is currently no consensus as to what causes issues like pervasive developmental disorders, Asperger’s syndrome, and autism. Some medical professionals are adamant that vaccines are the cause of these diseases, though this has been severely discounted by the majority of the medical community.

Still other doctors and psychologists point to environmental and genetic factors that pre-dispose a child to acquiring a pervasive developmental disorder in some way. Environmental factors may include things from upbringing and how a child is raised, to things like toxins consumed by the mother during pregnancy, and more.


Symptoms of PDD may include fairly significant communication problems, including the difficulty of speech, and using and understanding language. Still other issues and symptoms include a difficulty in relating to people, objects, or places, including a lack of eye contact and other social skills, and a lack of facial responses.

Other symptoms of issues relating to PDD include the difficulty in adapting to change and the difficulty in adapting to a person’s surroundings adequately. Stress and the presence of change may be a factor here, as well. Repetitive body movements have proven to be a symptom of many disorders related to Asperger’s and autism, including foot tapping, hand flapping, twirling of the hair, and more complex movements that are repetition-based and done for seemingly no reason at all. Lack of empathy and a lack of desire for physical contact is another common one.

Those who experience pervasive developmental disorders experience a very wide and complicated range of symptoms, not all of which are adequately known or understood by doctors and psychologists in the medical community.