Bruce F. Pennington|Dorothy V. M. Bishop
Relations Among Speech, Language, and Reading Disorders
University of Denver|University of Oxford
article critically review evidence overlap among three developmental disorders namely speech sound disorder ssd language impairment li reading disability rd three levels analysis diagnostic cognitive etiological find overlap exists three levels varies comorbidity subtype relations among three disorders complex fully understood evaluate comorbidity models rejected supported explanations three disorders overlap new data needed better define relations