“…The additional data would serve to improve more effective programs of intervention. (Feiner & Tarnow, 1972;Petrie, Brown, Piersel, Frinfrock, Schelble, Leblanc & Kratochwill, 1980;Scott, 1980). The aim of the present survey was to study the incidence of MSC for learningdisabled children who regularly attend special schools, comparing them with two control groups: normal children attending special schools and educable mentally retarded (EMR) children who attend a special school for EMR children.…”