Selective Mutism
“In the DSM-IV selective mutism is described as a rare psychological disorder in children. Children (and adults) with the disorder are fully capable of speech and understanding language, but fail to speak in certain social situations when it is expected of them. They function normally in other areas of behaviour and learning, though appear severely withdrawn and might be unwilling to participate in group activities. It is like an extreme form of shyness, but the intensity and duration distinguish it. As an example, a child may be completely silent at school, for years at a time, but speak quite freely or even excessively at home.”
Source: “Selective mutism.” Wikipedia, The Free Encyclopedia. 4 Feb 2006, 05:37 UTC. 6 Feb 2006, 01:22
http://en.wikipedia.org/w/index.php?title=Selective_mutism&oldid=38106756
