What Is Selective Mutism?
Selective mutism is an anxiety disorder in which a child is fully capable of speaking but consistently fails to speak in specific social situations (typically school or public) despite speaking normally in other settings (home, with immediate family).
It is not defiance. The child is not choosing to be silent as a power play — they are experiencing genuine anxiety that physically prevents speech in certain contexts.
Signs of Selective Mutism
- Speaks freely at home but completely silent at school
- May whisper or gesture but not produce full speech outside home
- May freeze or look "blank" when expected to speak
- Has been silent since starting school (often, SM onset is with school entry)
- Normal or above-normal intelligence
- Often has other signs of anxiety — social withdrawal, separation anxiety, rigid routines
Selective Mutism vs. Shyness
Shyness is a personality trait — a shy child eventually warms up and speaks in new situations. Selective mutism is extreme — the child does not speak in the situation even after months or years, even when they clearly want to communicate.
Causes
Selective mutism is an anxiety disorder, not a speech disorder. It is associated with: shy/inhibited temperament, family history of anxiety, social anxiety disorder, sometimes bilingual/multilingual environment (though language difference alone does not cause SM).
Treatment
Cognitive behavioral therapy (CBT) adapted for SM, combined with gradual exposure (slowly expanding speaking situations), is the evidence-based treatment.
In India, child psychologists and psychiatrists in major cities can treat SM. Medication (SSRIs) may be recommended for severe cases alongside therapy.