This text provides a comprehensive and authoritative survey of what is currently known about the psychological, psychobiological and socio-educational aspects of Down"s syndrome. Drawing together contributions from experts in the relevant fields, the text covers genetics, brain characteristics, ageing and Alzheimer"s disease in relation to Down"s syndrome, the life-span development of psychological functions (memory, oral and written language, cognition, learning, affectivity and psychopathology) and major socio-educational issues - school and society integration, and work for Down"s syndrome persons. The book should be of interest to students, university teachers and professionals in the fields of psychology, psycholinguistics, genetics, neurology and special education.