Factors affecting the development of a taxonomy of psychopathology for children with mental retardation are considered, along with the following diagnostic areas to address: stereotypic behavior and self-injury, autism, organic brain syndromes, and pervasive developmental disorders. Using data from multivariate studies and findings related to…

This review summarizes subject selection and diagnostic procedures documented in 142 empirical articles published between 1993 and 1997. Although most researchers reported use of standard diagnostic criteria in classifying subjects, numerous studies did not report diagnostic methods and there was often a lack of specification of inclusion and…

The study sought to determine whether 100 emotionally disturbed, mentally retarded Ss assigned four distinct diagnostic labels could be differentiated from each other on the basis of sex, age, degree of mental impairment, and adaptive behavior. (Author)

This study examined the validity and internal and interrater reliability of the Wing Subgroups Questionnaire, an assessment that classifies children with autism into subtypes. Subjects were 42 students (ages 5 to 22) enrolled in multihandicapped special education classrooms. Findings support the reliability and validity of the questionnaire for…