Ive never really heard of it...but i stopped talking when i was 9 in grade four...i stopped playing with the other kids and id just go sit under the trees and read my books...it started when i lived with my grandparents on the school holidays...(in hindsight: it probably happened because i was being abused there)..and then it just continued on at school...it didn't last very long after getting back to school as i was taken straight to child psychiatrists at the childrens hospital and psychologists and i started talking again..i don't remember much of it...and didn't really take much notice or think it was a problem...my parents were the ones who took me to the apptments but it was my school who organized it...and even with these interventions...the abuse was still missed.....probably because i was never asked about it...not that i remember...and i couldn't articulate it anyway....hmm..well it's just a distant memory for me...i don't think it really impacted me too much...they just put it down to shyness and low self esteem and sent me to kids art classes which i loved...:-)