Developmental Language Disorders: From Phenotypes to Etiologies is based on the recent conference of the same name sponsored by the Merrill Advanced Studies Center of the University of Kansas. In the past 10 years, considerable advances have taken place in our understanding of genetic and environmental influences on language disorders in children. Significant research in behavioral phenotypes, associated neurocortical processes, and the genetics of language disorders has laid the foundation for further breakthroughs in understanding the reasons for overlapping etiologies, as well as the unique aspects of some phenotypes. Too often the findings are disseminated in a fragmented way because of the discrete diagnostic categories of affectedness. This volume attempts to assimilate and integrate the findings of the transdisciplinary research toward a more coherent picture of behavioral descriptions, brain imaging studies, genetics, and intervention technologies in language impairment. The contributing authors are all scholars with active programs of research funded by the National Institutes of Health involving diverse clinical groups of children with language impairments.

Spotlighting two of the most prevalent and most researched genetically based disabilities - Down syndrome and Fragile X syndrome - this cutting-edge text clarifies the distinct speech and language issues associated with each disorder and helps readers conduct individualized assessment and intervention.An essential upper-level textbook and an invaluable professional reference, this book gives readers the up-to-date research and clinical insight they need to: fully understand both disabilities - the behaviors, characteristics, genetics, and treatments associated with each; see how speech and language develop across the lifespan, from infancy to adulthood; apply principles of effective assessment with people from every age group; use specific interventions to support key aspects of speech and language development; tailor assessment and intervention to an individual's communicative needs and abilities; tune into the family's perspective and encourage their ongoing involvement; and examine other disorders by using this research as a model for future practice.Authoritative contributions from more than 15 leading experts prepare readers for effective clinical practice, and the ""directions for research"" sections throughout the book help researchers shape future studies and move the field forward. A necessary resource for SLPs, pediatricians, AAC specialists, and early interventionists, this definitive volume is key to supporting the communicative competence of people with Down syndrome and Fragile X syndrome at every stage of life.