Dyslexia and Science

Because dyslexia varies in degrees of severity, its diagnosis is divided into three sub-classifications: as a developmental reading disorder, a specific reading disability, and a specific learning disability. Dyslexia is defined as a substantial and persisting disturbance for the acquisition of the written language. Dyslexics have difficulties converting the spoken language into the written language and vice versa. 

The accepted causes of dyslexia include a genetic predisposition, problems in processing auditive and visual perceptions and problems in the assimilation of language, especially phonology.The dysfunction occurs unexpectedly and in an isolated manner ( i.e. problems in writing arise without a plausible explanation such as one is less gifted or because of poor schooling).        

Researchers suggest that approximately fifteen percent of the school children are affected by some form of dyslexia. With early detection, the symptoms for the most part can be alleviated. Conversely, when therapy begins later, its effectiveness is usually less dramatic.