New genetic causes of mental retardation are being discovered at rapid rates--every day more people are diagnosed with specific syndromes. This comprehensive guide identifies characteristics of people with these syndromes to help you understand their behaviors and needs, provide better interventions, and create wider community inclusion. Through easy-to-read, detailed discussions of four major syndromes--Down, Williams, fragile X, and Prader-Willi--you'll learn about genetic causes and implications, cognitive profiles, medical complications, prevalence of these syndromes, speech and language issues, behavioral issues, and basic physical characteristics. You'll also find research-based intervention strategies that help you manage issues related to education, personal relationships, employment, and living arrangements. And you'll get in-depth information on five less researched syndromes: velocardiofacial, Rubinstein-Taybi, Angelman, Smith-Magenis, and 5p- (cri-du-chat). This book provides the solid foundation of knowledge you're looking for to better support individuals with genetic disorders.