Synonyms DISCO Abbreviations ADI-R Autism diagnostic interview-revised PDD Pervasive developmental disorders Description The for Social and is a semistructured interview schedule used Diagnostic Interview Communication Disorders (DISCO) with the parent or carer of an individual to elicit a broad picture of the individual's behaviors and needs. Its primary purpose is to elicit information releva...

The purpose of this study was to examine the diagnostic and developmental profiles of 105 children given a PDD-NOS diagnosis. Four subgroups were formed based on the reason for the PDD-NOS diagnosis (fewer than 6 criteria, fewer than 2 social criteria, no repetitive behaviours, and other). Cognitive level, adaptive functioning, autism severity, and the number of DSMIV autism criteria were exami...

Autism and other pervasive developmental disorders (PDDs) are a phenomenologically related set of neuropsychiatric disorders. These conditions are characterized by patterns of both delay and deviance in multiple areas of development; typically their onset is in the first months of life (APA, 1994; Volkmar & Klin, 2005). Although often associated with some degree of mental retardation, the patte...

BACKGROUND Behavioural and emotional problems occur at a high rate in children and adolescents with intellectual disability, often from a young age. Some studies have indicated that children and adolescents with autism present with even higher rates. Less is known about the presentation, development and family impact of these difficulties in young children with autism. This study aimed to explo...

BACKGROUND In addition to the core symptoms, children with Pervasive Developmental Disorders (PDD) often exhibit other problem behaviors such as aggression, hyperactivity, and anxiety, which can contribute to overall impairment and, therefore, become the focus of clinical attention. Limited data are available on the prevalence of anxiety in these children. We examined frequency and correlates o...

OBJECTIVE To identify pre-, peri- and neonatal risk factors for pervasive developmental disorders (PDD). METHODS We searched the Medline database through March 2011 for relevant case-control and population-based studies on pre-, peri- and neonatal hazards related to PDD, including autism. We identified 85 studies for this review. Data were extracted systematically and organized according to r...

OBJECTIVE Substantial revisions to the DSM-IV criteria for autism spectrum disorders (ASDs) have been proposed in efforts to increase diagnostic sensitivity and specificity. This study evaluated the proposed DSM-5 criteria for the single diagnostic category of autism spectrum disorder in children with DSM-IV diagnoses of pervasive developmental disorders (PDDs) and non-PDD diagnoses. METHOD T...

In this paper, we give an overview of the diagnostic categories of autism and other pervasive developmental disorders (PDDs) and discuss the changes in the DSM classification system over the past 20 years. We describe each subtype of PDD, along with comorbid psychiatric conditions, assessment guidelines, and tools for diagnosis. The epidemiology of autism has generated much discussion and resea...