| dc.description.abstract | Approximately 42 million Americans have some type of communication disorder, costing the nation $30 billion to $154 billion for lost productivity, special education, and medical care annually. The quality of the numerous evaluation procedures and instruments for clinical decisionmaking about language, speech, or voice disorders influences decisions about access to services and funding (e.g., special education services, Social Security disability income). The RTI-University of North Carolina at Chapel Hill Evidence-based Practice Center conducted a systematic review of the literature to address two key questions about evaluating and diagnosing speech and language disorders in adults and children of particular concern to the Social Security Administration in making disability eligibility determinations: (1) What instruments have demonstrated reliability, validity, and normative data? (2) Do these instruments have predictive validity for an individual's communicative impairment, performance, or both? | |
