A child and their parent were asked to participate in a research project that sought to study whether sleeping in a very clean environment for 14 days improved the elimination of chemicals and metals from the child's body. The child had an approximately two hour evaluation to confirm his or her diagnosis of Autism or Pervasive Developmental Disorder. Not Otherwise Specified. When one of these diagnoses was confirmed the child was scheduled to spend 14 nights sleeping in a very clean environment in a specially created room at The Children's Institute.