a disorder, as dyslexia, usually affecting school-age children of normal or above-normal intelligence, characterized by difficulty in understanding or using spoken or written language, and thought to be related to impairment or slowed development of perceptual motor skills.
A disorder in the basic cognitive and psychological processes involved in using language or performing mathematical calculations, affecting persons of normal intelligence, and not the result of emotional disturbance or impairment of sight or hearing.learning disorder
Any of various disabilities of the basic cognitive and psychological processes involved in using language or performing mathematical calculations. Learning disabilities are not caused by low intelligence, emotional disturbance, or physical impairment (as of hearing). Dyslexia is a common learning disability.
