Judy, I just read your message about selective mutism. I work in the public school setting and have had several students identified with it. This is difficult even for professionals, to accept.
Parents are relucant to think of their child as having such a problem.
I was actually right outside the door, while the little boy chatted away with his sister, whom I arranged to be there. I played it for our screening committee, who had to admit he spoke very well. I truly feel the school system is doing these children a grave disservice, if the only service they recieve is speech therapy. I hope this helps somewhat.