Recent research indicates that while diagnostic distinctions between autism spectrum disorder and social communication disorder persist in adolescence, practical functioning often converges, highlighting the need for comprehensive assessments that go beyond labels.
A new study from Frontiers in Psychiatry suggests that social communication disorder and autism spectrum disorder remain meaningfully different in adolescence, even after accounting for age and intellectual ability, but that the gap in day-to-day functioning is narrower than symptom scores alone might imply.
Researchers in South Korea reviewed baseline data from 120 adolescents aged 10 to 18, including 76 with autism spectrum disorder and 44 with social communication disorder. After matching participants for age and full-scale IQ, the team found that teenagers with social communication disorder still showed substantially milder lifetime autism-related traits on the Autism Diagnostic Interview-Revised, with the clearest differences appearing in reciprocal social interaction, communication and restricted, repetitive behaviours.
Current symptoms, measured with the Social Responsiveness Scale, Second Edition, told a slightly different story. The social communication disorder group again scored better overall, but the separation between groups was smaller than for lifetime history, and one subscale, social motivation, did not differ significantly. That pattern may matter clinically, because social motivation is often discussed as part of autism’s social profile yet has received far less attention in social communication disorder.
The study also found that adolescents with social communication disorder generally did better on adaptive functioning, which reflects practical skills such as communication, daily living and socialisation. But once age and IQ were taken into account, the differences in communication and socialisation were no longer statistically significant. Daily living skills and the overall adaptive behaviour score still favoured the social communication disorder group.
The findings point to a more complicated picture than diagnosis alone can capture. The researchers argued that intellectual ability and developmental stage help shape how strongly symptoms and functional limitations show up, particularly in adolescence, when social demands rise sharply. In other words, two young people with different diagnoses may still have similar real-world needs.
Psychiatric comorbidity also appeared to matter. The team reported that the presence of other mental health conditions, and to a lesser extent attention-deficit/hyperactivity disorder, moderated some of the differences in adaptive functioning between the two groups. Where comorbidity was absent, the gap in communication and socialisation was much wider.
That finding is notable because attention to social communication disorder in the research and clinical literature has lagged well behind autism. The disorder was added to the DSM-5 to describe persistent pragmatic communication problems in people who do not meet criteria for autism, but its boundaries remain debated. Many assessment tools and intervention pathways are still built around autism rather than social communication disorder, which can leave families with a diagnosis that is less well served by existing systems.
The authors concluded that clinicians should not rely on diagnosis alone when judging support needs. A fuller picture should include developmental history, cognitive ability, current symptoms, adaptive functioning and co-occurring psychiatric conditions. For parents and caregivers, the practical message is that a less severe autism profile does not necessarily mean a child or teenager is functioning easily in everyday life.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
