This paper urges advancement and refinement in the assessment of people with autistic disorders to include evaluation of additional psychiatric conditions which are frequently present, especially in lower-functioning autistic individuals. Implications of more comprehensive assessment for behavioral and medical intervention are discussed. (DB)

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…