noun
A clinical term for an anxiety disorder where a person who is normally capable of speech does not speak in specific social situations.
場面緘黙症の子どもは、家では話せるのに学校では話せないことがある。
A child with selective mutism may be able to speak at home but not at school.
Compound of 場面 (situation) + 緘黙 (silence) + 症 (condition). The term is a direct translation of the English 'selective mutism'.