(Pragmatic) Communication Disorder
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Swineford et al. Journal of Neurodevelopmental Disorders 2014, 6:41 http://www.jneurodevdisorders.com/content/6/1/41 REVIEW Open Access Social (pragmatic) communication disorder: a research review of this new DSM-5 diagnostic category Lauren B Swineford1*, Audrey Thurm1, Gillian Baird2, Amy M Wetherby3 and Susan Swedo1 Abstract Social (pragmatic) communication disorder (SCD) is a new diagnostic category in the Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5). The purpose of this review is to describe and synthesize the relevant literature from language and autism spectrum disorder (ASD) research relating to pragmatic language impairment and other previously used terms that relate to SCD. The long-standing debate regarding how social communication/pragmatic impairments overlap and/or differ from language impairments, ASD, and other neurodevelopmental disorders is examined. The possible impact of the addition of SCD diagnostic category and directions for future research are also discussed. Keywords: Social communication disorder, Pragmatic language impairment, Autism spectrum disorder, DSM-5 Introduction communication disorder), but cannot be diagnosed in the Social (pragmatic) communication disorder (SCD) is a new presence of autism spectrum disorder (ASD) [1]. diagnostic category included under Communication Disor- The origins of SCD are in the speech and language lit- ders in the Neurodevelopmental Disorders section of the erature, which documents pragmatic language impair- Diagnostic and Statistical Manual of Mental Disorders, ment as a distinct pattern of deficits in social use of fifth edition (DSM-5) [1]. SCD is defined by a primary def- language. It is worth noting that the DSM-5 SCD criteria icit in the social use of nonverbal and verbal communica- explicitly include nonverbal communication, while trad- tion (see Table 1 for the full list of criteria). Individuals itionally, pragmatic language did not. Still, the terms social with SCD may be characterized by difficulty in using lan- communication and pragmatic impairments are often used guage for social purposes, appropriately matching com- interchangeably in the literature, so it is perhaps unsurpris- munication to the social context, following rules of the ing that individuals with these primary deficits have also communication context (e.g., back and forth of conversa- been described frequently in neuropsychological literature tion), understanding nonliteral language (e.g., jokes, idioms, [2,3] and ASD literature [4,5]. metaphors), and integrating language with nonverbal com- In the DSM-5, ASD is a new diagnostic category in the municative behaviors. Sufficient language skills must be de- Neurodevelopmental Disorders section, characterized by veloped before these higher-order pragmatic deficits can be impairments in social communication and social reci- detected, so a diagnosis of SCD should not be made until procity and by the presence of restricted interests and children are 4–5 years of age. Social communication dis- repetitive behaviors. DSM-5 ASD replaces the disorders order can co-occur with other communication disorders in that comprised the DSM-IV pervasive developmental dis- the DSM-5 (these include language disorder, speech sound orders (PDD) category, including autistic disorder, Asper- disorder, childhood-onset fluency disorder, and unspecified ger’s disorder, and pervasive developmental disorder, not otherwise specified (PDD-NOS). The inclusion of SCD was partially driven by the transi- * Correspondence: [email protected] 1National Institute of Mental Health, Pediatrics and Developmental tion from DSM-IV PDD to DSM-5 ASD and the subse- Neuroscience Branch, 10 Center Drive MSC 1255, Building 10, Room 1C250, quent loss of DSM-IV PDD-NOS. PDD-NOS was a broad Bethesda, MD 20892-1255, USA diagnostic category that included all conditions in which Full list of author information is available at the end of the article © 2014 Swineford et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. Swineford et al. Journal of Neurodevelopmental Disorders 2014, 6:41 Page 2 of 8 http://www.jneurodevdisorders.com/content/6/1/41 Table 1 Social (pragmatic) communication disorder Although SCD may serve as a diagnostic home for in- Diagnostic Criteria 315.39 (F80.89) dividuals who would have previously met the criteria for A. Persistent difficulties in the social use of verbal and nonverbal DSM-IV PDD-NOS, the goal of new DSM diagnostic communication as manifested by all of the following: categories is not to prevent the loss of previously diag- 1. Deficits in using communication for social purposes, such as nosed disorders, but instead to represent natural phenom- greeting and sharing information, in a manner that is appropriate ena as accurately as possible. Therefore, the rationale for for the social context. the addition of SCD to DSM-5 communication disorders 2. Impairment of the ability to change communication to match was rooted in literature suggesting that the impairment in context or the needs of the listener, such as speaking differently in a classroom than on a playground, talking differently to a child pragmatics that is observed in individuals with significant than to an adult, and avoiding use of overly formal language. social communication deficits can be differentiated from 3. Difficulties following rules for conversation and storytelling, such as the structural and formulation difficulties that characterize taking turns in conversation, rephrasing when misunderstood, and language disorder. However, a long-standing debate exists knowing how to use verbal and nonverbal signals to regulate regarding the nature of the overlap between social commu- interaction. nication/pragmatic impairments and other communication 4. Difficulties understanding what is not explicitly stated (e.g., making and neurodevelopmental disorders. The introduction of inferences) and nonliteral or ambiguous language (e.g., idioms, humor, metaphors, multiple meanings that depend on the context the SCD diagnosis does not settle this debate, but instead for interpretation). gives researchers a tool with which to develop empirical B. The deficits result in functional limitations in effective communication, evidence to answer the question. social participation, social relationships, academic achievement, or Thus, in addition to the question of the overlap between occupational performance, individually or in combination. SCD and other language disorders, important questions C. The onset of symptoms is in the early developmental period (but exist surrounding the practice of ruling out DSM-5 ASD deficits may not become fully manifest until social communication demands exceed limited capacities). when SCD is diagnosed [8]. Since the publication of the DSM-5, there has been a focus on how these particular is- D. The symptoms are not attributable to another medical or neurological condition or to low abilities in the domains of word sues may affect clinical practice [8]. While such discussions structure and grammar, and are not better explained by autism are important, the current review focuses on previous spectrum disorder, intellectual disability (intellectual developmental research relating to the new DSM-5 category and outlines disorder), global developmental delay, or another mental disorder. research to be conducted to investigate the validity of the Reprinted with permission from the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, (Copyright 2013). American Psychiatric new diagnostic category. As described below, SCD aligns Association. conceptually and practically with pragmatic language impairment, although SCD was purposefully expanded to incorporate difficulties with nonverbal communication. “there is severe and pervasive impairment in the develop- From the existing literature, we summarize what is known ment of reciprocal social interaction associated with im- about differential diagnosis, familial aggregation, develop- pairment in either verbal or nonverbal communication mental course, and prognosis. We also discuss the possible skills or with the presence of stereotyped behaviors, inter- impact of changes in the DSM-5 ASD criteria. We ests, and activities” [6]. Because DSM-5 ASD criteria require emphasize here and throughout that given the variable thepresenceofrepetitivebehaviors,somehaveraisedthe definitions used for pragmatic language impairment in concern that some individuals who met the DSM-IV PDD- thepastandthebroaderdefinitionofSCDinthe NOScriterianolongerhaveadiagnostichomeandwill DSM-5, it is not yet known if and how the extant lit- therefore be ineligible for the treatment services appropriate erature on pragmatic language impairment will relate for their impairments. Thus, SCD and ASD are common in to findings for SCD. the requirement of deficits in social communication skills, but individuals with SCD cannot evidence restricted inter- Review ests, repetitive behaviors, insistence on sameness, or sensory Distinguishing pragmatic impairments from language abnormalities. It is essential