Is “Selective Mutism” a form of Autism?
I can see what you were getting at. Both selective mutism and autism involve communication impairments. But selective mutism is not a form of autism. Selective mutism is characterized by not speaking in situations when speaking is expected, despite being able to speak and speaking in other situations. Austistic Disorder, on the other hand, is characterized by abnormal or impaired development in social interaction and communication, and a restricted repertoire of activity and interests.