Autism spectrum disorder (ASD), the term that replaced pervasive developmental disorders (PPDs), is a condition that affects how someone interacts with the world around them. It ranges in severity ...

Pervasive developmental disorders (PDD) — now known as autism spectrum disorder (ASD) — refers to a group of conditions that affect average development. It may appear as a delay in development ...

Dr. Michael Alessandri answers the question: 'PDD vs. Autism Spectrum Disorder?' Oct. 23, 2008 -- Question: Is a pervasive developmental disorder the same as an autism spectrum disorder?

Alexa Mitchell was diagnosed with pervasive developmental disorder — characterized by delays in the development of social and communication skills and now known as autism spectrum disorder ...

Until recently, experts talked about different types of autism, such as autistic disorder, Asperger’s syndrome, pervasive developmental disorder not otherwise specified (PDD-NOS). But now they ...

Most existing studies have centered on 2 forms of PDD--autism and Rett disorder. The ratio of boys to girls with autism is approximately 3:1 to 4:1. Consistent with the difference in IQ is the ...

We hypothesize that Duchenne muscular dystrophy and autism spectrum disorder/pervasive developmental disorder co-occur with a greater than random frequency. In this study, we set out to reject the ...

At 2, Luke Clark was diagnosed with pervasive developmental disorder, now considered a subset of autism spectrum disorder. He communicates with just a few words and a bit of sign language.

The concept was Pervasive Adult Developmental Disorder. I developed it because I was dissatisfied with the way the Diagnostic and Statistical Manual System worked for categorizing the problems ...

Of these, 43 studies provided information on the prevalence of autistic disorder and 19 studies ... surveys of autism and other pervasive developmental disorders: an update. J Autism Dev Disord ...