Diagnosis and assessment of autistic spectrum disorders

Because language deficits are often present among individuals with pervasive developmental disorders, evaluation of language abilities is an essential part of a comprehensive assessment. According to Wetherby, Prizant, and Schuler (2000), assessment of language skills for persons with autistic spectrum disorders must focus on three broad areas of concern: linguistics, social and emotional communication, and language-related cognitive functions. Linguistic evaluation includes assessment of both expressive and receptive language. Examination of social and emotional communication must assess reciprocity of social interaction, understanding and expression of emotion, and regulatory strategies to manage emotional arousal. Finally, evaluation of language-related cognitive domains must include an assessment of the use of symbolic representations and imitation (Wetherby et al.).