Society for Neuroscience
A staggering 5 to 15 percent of Americans?14.5 to 43.5 million children and adults?have dyslexia, a learning disability that makes it difficult to read, write, and spell, no matter how hard the person tries or how intelligent he or she is. For years?until advances in neuroscience helped reveal a biological basis for the disorder?people with dyslexia were called "dumb" or "lazy." In a world where reading and writing skills are in increasing demand, the impact of dyslexia on individuals?and on U.S. society?can be devastating. About 80 percent of learning disabled children eligible for special education services has significant reading difficulties, including dyslexia.