How Common Is Dyslexia?

Dr. Sally Shaywitz, co-director of the Yale Center for Dyslexia and Creativity, estimates that 80 to 90 percent of children who struggle with learning disorders have dyslexia — as many as one in five children. Many dyslexic children go undiagnosed, she argues, and school failure that is attributed to environmental factors or intelligence is often undiagnosed dyslexia. Experts used to think that dyslexia was more common in boys than girls, but current research shows that it affects girls and boys equally.