If your child struggles with conversation, social cues, or making friends, you might hear two terms from professionals: Social Communication Disorder (SCD) and Autism Spectrum Disorder (ASD). They sound similar — and both affect communication — but they are not the same condition.
Understanding the difference helps parents get the right evaluation, supports, and therapy for their child.
What Is Social Communication Disorder (SCD)?
SCD affects how children use language in social situations. A child with SCD may:
- Have trouble knowing when it’s their turn to talk.
- Struggle to stay on topic in conversation.
- Misunderstand sarcasm, jokes, or idioms.
- Find it difficult to adjust tone or language to different people or settings.
SCD is diagnosed when these challenges are not explained by autism or another developmental condition. It is recognized in the DSM-5 as a standalone diagnosis.
👉 Related reading: Language Disorders and Autism
What Is Autism Spectrum Disorder (ASD)?
ASD also includes social communication challenges, but always with restricted and repetitive behaviors (RRBs). These may include:
- Repetitive movements (flapping, rocking).
- Strong focus on routines or special interests.
- Sensory differences, such as sensitivity to sound or textures.
Without restricted/repetitive behaviors, a diagnosis of autism cannot be made — even if social communication challenges are significant.
👉 You may also like: Sensory Processing Disorder and Autism
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Key Differences Between SCD and ASD
| Feature | Social Communication Disorder | Autism Spectrum Disorder |
|---|---|---|
| Social communication challenges | Present Present | Present Present |
| Restricted/repetitive behaviors | Absent Absent | Present Present |
| Sensory differences | Uncommon Uncommon | Common Common |
| Diagnosis age | Often later in childhood | Often before age 3 |
| Treatment focus | Social language skills | Social skills + managing sensory/behavioral differences |
How Evaluations Work
Professionals may use:
- Speech-language evaluations for communication skills.
- Autism-specific assessments (such as the ADOS-2).
- Developmental history reviews with caregivers.
If restricted or repetitive behaviors are absent, and social communication is the primary challenge, SCD is more likely.
Therapies for Both Conditions
While SCD and autism are distinct diagnoses, therapies often overlap:
- Speech-language therapy to improve conversation and comprehension.
- Social skills groups for real-world practice.
- Visual supports to aid understanding and routines.
- Parent training for carrying strategies into daily life.
For children with autism, treatment may also include:
- ABA therapy to strengthen communication and behavior.
- Occupational therapy for sensory processing.
- Daily living skills support for independence.
👉 Learn more: Teaching Communication Skills with ABA