Social (pragmatic) communication disorder (SPCD), also known as pragmatic language impairment (PLI), is a neurodevelopmental disorder characterized by significant difficulties in the social use of verbal and nonverbal communication. Individuals with SPCD struggle to effectively engage in social interactions, interpret social cues, and use language appropriately in social contexts. This disorder can have a profound impact on an individual's ability to establish and maintain relationships, navigate social situations, and participate in academic and professional settings. Although SPCD shares similarities with other communication disorders, such as autism spectrum disorder (ASD), it is recognized as a distinct diagnostic category with its own set of diagnostic criteria and features.

It has only been since 2013 that SPCD has become its own category in the DSM-5.^[1] In creating this new category it allowed individuals to be considered with a form of communication disorder distinct from PLI and Autism Spectrum Disorder (ASD).^[2] SPCD lacks behaviors associated with restrictions and repetition which are seen in ASD.^[3]

Overview

Symptoms

Individuals with social communication disorder have particular trouble understanding the meaning of what others are saying, and they are challenged in using language appropriately to get their needs met and interact with others. Children with the disorder often exhibit:

• Delayed language development
• Language disorders (similar to the acquired disorder of aphasia) such as word search pauses, jargoning, word order errors, word category errors, verb tense errors.
• Stuttering or cluttering speech
• Repeating words or phrases
• Tendency to be concrete or prefer facts to stories
• Difficulties with:
  • Pronouns or pronoun reversal
  • Understanding questions
  • Understanding choices and making decisions
  • Following conversations or stories (conversations are "off-topic" or "one-sided")
  • Extracting the key points from a conversation or story; they tend to get lost in the details
  • Verb tenses
  • Explaining or describing an event
  • Understanding satire or jokes and contextual cues
  • Reading comprehension
  • Reading body language
  • Making and maintaining friendships and relationships because of delayed language development
  • Distinguishing offensive remarks

According to Bishop and Norbury (2002), children with semantic pragmatic disorder can have fluent, complex and clearly articulated expressive language but exhibit problems with the way their language is used. These children typically are verbose. However, they usually have problems understanding and producing connected discourse, instead giving conversational responses that are socially inappropriate, tangential and stereotyped. They often develop eccentric interests but not as strong or obsessional as people with autism spectrum disorders.

The current view, therefore, is that the disorder has more to do with communication and information processing than language. For example, children with semantic pragmatic disorder will often fail to grasp the central meaning or saliency of events. This then leads to an excessive preference for routine and "sameness" (seen in autism spectrum disorders), as children with SCD struggle to generalize and grasp the meaning of situations that are new; it also means that more difficulties occur in a stimulating environment than in a one-to-one setting.

A further problem caused by SCD is the assumption of literal communication. This would mean that obvious, concrete instructions are clearly understood and carried out, whereas simple but non-literal expressions such as jokes, sarcasm and general social chatting are difficult and can lead to misinterpretation. Lies are also a confusing concept to children with SCD as it involves knowing what the speaker is thinking, intending and truly meaning beyond a literal interpretation.

Diagnosis

Due to the fact that the SPCD has been categorized only since 2013, diagnosis is yet to be fully established. In the DSM-5, the child is diagnosed with SPCD if the child does not meet the criteria for other disorders such as ASD and PDD-NOS.^[1]

The DSM-5 categorizes SPCD as a communication disorder within the domain of neurodevelopmental disorders, listed alongside other disorders of speech and language which typically manifest in early childhood. The DSM-5 diagnostic criteria for social communication disorder is as follows:

• A. Persistent difficulties in the social use of verbal and nonverbal communication as manifested by all of the following:

1. Deficits in using communication for social purposes, such as greeting and sharing information, in a manner that is appropriate for the social context.
2. Impairment of the ability to change communication to match context or the needs of the listener, such as speaking differently in a classroom than on a playground, talking differently to a child than to an adult, and avoiding use of overly formal language.
3. Difficulties following rules for conversation and storytelling, such as taking turns in conversation, rephrasing when misunderstood, and knowing how to use verbal and nonverbal signals to regulate interaction.
4. Difficulties understanding what is not explicitly stated (e.g., making inferences) and nonliteral or ambiguous meanings of language (e.g., idioms, humor, metaphors, multiple meanings that depend on the context for interpretation).

• B. The deficits result in functional limitations in effective communication, social participation, social relationships, academic achievement, or occupational performance, individually or in combination.
• C. The onset of symptoms is in the early developmental period (but deficits may not become fully manifested until social communication demands exceed limited capacities).
• D. The symptoms are not attributable to another medical or neurological condition or to low abilities in the domains of word structure and grammar, and are not better explained by autism spectrum disorder, intellectual disability (intellectual developmental disorder), global developmental delay, or another mental disorder.

Treatment

Treatments for SPCD are less established than for treatments for other disorders such as autism.^[5] Similarities between SPCD and some aspects of autism leads some researchers to try some treatments for autism with people with SCD.^[6]

Speech therapy can help individuals who have communication disorders. Speech and language therapy treatment focuses on communication and social interaction.^[7] Speech therapists can work with clients on communication in various settings.^[8]

Prognosis

Similar or related disorders

Hyperlexia is a similar but different disorder where main characteristics are an above-average ability to read with a below-average ability to understand spoken or written language. Joanne Volden wrote an article in 2002 comparing the linguistic weaknesses of children with nonverbal learning disability to PLI.^[9]

History

In 1983, Rapin and Allen suggested the term "semantic pragmatic disorder" to describe the communicative behavior of children who presented traits such as pathological talkativeness, deficient access to vocabulary and discourse comprehension, atypical choice of terms and inappropriate conversational skills.^[13] They referred to a group of children who presented with mild autistic features and specific semantic pragmatic language problems. In the late 1990s, the term "pragmatic language impairment" (PLI) was proposed.^[14][15]

Rapin and Allen's definition has been expanded and refined by therapists who include communication disorders that involve difficulty in understanding the meaning of words, grammar, syntax, prosody, eye gaze, body language, gestures, or social context. While autistic children exhibit pragmatic language impairment, this type of communication disorder can also be found in individuals with other types of disorders including auditory processing disorders, neuropathies, encephalopathies and certain genetic disorders.^[16]

Prior to the release of the DSM-5, there was debate over the relationship between semantic pragmatic disorder and autistic disorder, as the clinical profile of semantic pragmatic disorder is often seen in children with high-functioning autism.^[17] Before the DSM-5 specified SPCD as a separate diagnosis, people with SPCD symptoms were often diagnosed with pervasive developmental disorder not otherwise specified (PDD-NOS).^[18]

As mentioned in the introduction, SPCD has only been around since 2013. Before it emerged as its own disorder SPCD could have fallen into ASD, PLI, DLD, etc. The reason being because several of these disorders include an issue with social communication.^[19] In terms of developmental language disorder (DLD), individuals with this disorder have issues with language form and content and there seem to be any developmental cause.^[19] In social environments DLD seemed to have less difficulties than SPCD.^[19]

In regards to ASD, ASD behaviors normally involve repetitive behaviors^[20] which are normally not present in SPCD. It does not mean that SPCD does not show such behaviors.^[20]

PLI tends to be the disorder that is more common to SPCD than the other disorders due to the fact that both disorders are focused on the pragmatic difficulties individuals have in language with both disorders.^[21] SPCD has an element of social communication that is lacking or undeveloped, unlike PLI.^[22]

In terms of Specific language impairment, there tends to a lot of similarities to SCPD and PLI but SLI deals with Semantic-Pragmatic issues.^[22] This means that there are several issues that fall into Semantic- Pragmatic issues such as uncommon word choice, speaking to oneself out loud and interesting, unimpaired phonology and syntax.^[22]

See also

• Alexithymia
• Asperger syndrome
• Attention deficit hyperactivity disorder (ADHD)
• Autism
• High-functioning autism
• Hyperlexia
• Nonverbal learning disorder
• PDD not otherwise specified

References