YOUR QUESTION. A CLEARER NEXT STEP.
Selective Mutism: ICD-11 Features in Early Childhood
Selective Mutism (ICD-11 6B06) is an anxiety and fear-related disorder defined by consistent failure to speak in specific social situations despite normal speech elsewhere, persisting beyond one month with functional impact, and not explained by language unfamiliarity or a communication disorder.
In this answer 4 sections
A child who speaks freely at home yet falls silent at school is not being defiant — they are caught in a specific, treatable anxiety pattern.
In short
Selective Mutism (ICD-11 6B06) is a consistent failure to speak in specific social situations where speech is expected — typically school or with unfamiliar adults — despite speaking normally in other settings, usually the home. It is classified within anxiety and fear-related disorders, not as a communication or language disorder. The child can speak; situational anxiety blocks it.
The clinical picture
Under ICD-11, the core features in early childhood are:
- Selectivity — fluent, age-appropriate speech in comfortable settings (home, with close family) but consistent muteness in specific contexts.
- Duration and persistence — the pattern endures at least one month, extending beyond the normal settling-in period of starting nursery or school.
- Functional impact — interference with educational participation, social interaction or daily functioning.
- Exclusions — not better explained by a lack of familiarity with the spoken language required, and not attributable to a communication disorder (e.g. childhood-onset fluency disorder) or to a neurodevelopmental or psychotic disorder.
Onset is typically between ages 2 and 5, often first identified when formal schooling begins. High comorbidity with social anxiety and behavioural inhibition is well documented. Differentiate from transient situational reticence, hearing impairment, and language-exposure effects in multilingual children.
The Pinnacle way
Developmental measurement supports care planning; diagnosis requires an appropriately qualified healthcare professional., under qualified clinician care — never from an online tool. Our pathway combines graded-exposure behavioural work with speech therapy and family coaching across selective mutism support, anchored by the clinician-administered AbilityScore®.
Trusted sources
WHO ICD-11 Mortality and Morbidity Statistics (6B06); ASHA guidance on selective mutism; AAP developmental and behavioural resources.
Next step — Refer the family for a structured developmental and anxiety assessment at a Pinnacle centre.
This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.
CONNECT THE ANSWER TO YOUR CHILD’S DAY
Something to notice. Something to discuss.
What to notice
Fluent speech at home but consistent muteness at school or with unfamiliar adults, persisting beyond one month and beyond the settling-in period, with impact on educational or social participation.
In everyday life
Reassure parents not to pressure the child to speak; reduced demand and graded, low-anxiety exposure support speech far better than coaxing.
Bring your observations and questions to your child’s professional. Choose activities that suit your child’s comfort, abilities and agreed plan.
Bring your questions to a first visitQuestions families ask
Is Selective Mutism a speech disorder?
No. Under ICD-11 it sits within anxiety and fear-related disorders. The child has intact speech and language ability but is unable to speak in specific anxiety-provoking situations.
At what age does Selective Mutism typically present?
Onset is usually between 2 and 5 years, and it is frequently first recognised when the child begins nursery or formal schooling and the contrast with home speech becomes apparent.
How long must symptoms persist for the ICD-11 pattern?
The failure to speak in specific settings should persist for at least one month and extend beyond the normal initial settling-in period of starting school.
FOLLOW THE SOURCE
References behind this answer.
- Source referenceWHO ICD-11 MMS — Selective Mutism
- Source referenceASHA — Selective Mutism
- Organisation website · further readingAAP HealthyChildren — child development
References are supplied with this answer. An organisation homepage offers further reading; it does not establish an independent review of this page.
Content attribution: SETU Consortium · Pinnacle Blooms Network.
PEOPLE, TOPICS & DEVELOPMENT
See the connections.
Browse the wider question collections connected with this answer’s audience, developmental area and stage.
FROM UNDERSTANDING TO PURPOSEFUL SUPPORT
One question. Your child’s whole life.
Your child’s self-sufficient, mainstream-included life is the purpose from the beginning. At Pinnacle, that purpose shapes what we understand, the goals we choose, the people we bring together, everyday practice and review.
Connect this question with the right support.
Start with your child’s strengths, your observations and what you want everyday life to become.
Make the next conversation useful.
Bring the situations you notice at home or school. We’ll explain a suitable service, centre and first visit, including availability and fees, before you decide.
How PinnacleAI® connects the journeyExplore the seven stages
- 1Understand abilities
A starting picture of your child’s capabilities.
- 2Choose meaningful goals
Readiness and a plan shaped around the child.
- 3Bring the right support together
Suitable therapies and people for those goals.
- 4Carry practice into everyday life
Guidance for family, home and school.
- 5Track and correct
Use observations to adjust the plan.
- 6Reassess and review
Decide what to continue, change or do next.
- 7Grow independence and participation
The child’s life gives each step its purpose.
Explore the whole PinnacleAI® system → · Participation at school and in the community →
PINNACLE’S EVIDENCE, OPEN TO YOU
Look at the evidence behind our work.
Read our research, inspect the original regulatory documents and check what each institutional measure means.
General information supports a conversation with an appropriately qualified professional. Advice, goals and support depend on the individual child.