Pervasive Developmental Disorder (PDD)

PDD Not Otherwise Specified (PDD NOS) was broken out as a separate disorder. It is also sometimes interchangeable with Autism Spectrum Disorder (ASD). And like other diagnosis it has a wide range of intellectual functioning. Most of its defining features are with social challenges in social and language development. With the publication of the DSM-5 it is now part of Communication Disorders. “Some of these include language disorder (which combines DSM-IV expressive and mixed receptive-expressive language disorders), speech sound disorder (a new name for phonological disorder), and childhood-onset fluency disorder (a new name for stuttering). Also included is social (pragmatic) communication disorder, a new condition for persistent difficulties in the social uses of verbal and nonverbal communication.”