“…First, psychiatric disorders are four to five times more prevalent in children with ID as compared with other children (Chess & Hassibi, 1970;Eaton & Menolascino, 1982;Koller, Richardson, Katz, & McLaren, 1983;Reid, 1972;Rutter, Graham, & Yule, 1970;). Second, within samples of individuals with ID, prevalence estimates of psychopathology vary widely depending on the diagnostic criteria employed (Fraser, Leudar, Gray, & Campbell, 1986), nature of the sample, (community vs. institutional Leudar, Fraser, & Jeeves, 1984;Scanlon, Arick, & Krug, 1982), gender (Koller et al, 1983), age , level of ID (Iverson & Fox, 1989;Koller et al, 1983) and the manner in which the psychiatric evaluation was conducted (Iverson & Fox, 1989).…”