A lot vs. Alot: 9 Grammatical Pitfalls
pervasive developmental disorder per·va·sive developmental disorder (pər-vā'sĭv, -zĭv)
Any of a group of disorders of infancy, childhood, or adolescence that are characterized by distortions in the development of the basic psychological functions such as language, social skills, attention, perception, reality testing, and movement.
|pervasive developmental disorder |
Any of several developmental disorders, such as autism or Asperger's syndrome, characterized by severe deficits in social interaction and communication or by the presence of repetitive, stereotyped behaviors. Most of these disorders are evident in the first years of life.