Most research has concentrated on seeking to explain the cause of dyslexia, however this has proved to be somewhat unfruitful. Neurological research suggests that there may be some abnormality in the function of the left side of the brain which controls the speech system, whereas cognitive research in recent years has increasingly focused on problems of phonological awareness (the awareness of the speech sounds within words) and there has been speculation that these problems may be associated with a specific area of the brain.
One thing is conclusive however, it’s that the cause of dyslexia does center around an abnormality in the brain that prevents a person from correctly recognizing the right speech pattern. Many people that aren’t dyslexic can also have moments where they switch sounds out of their correct pattern which suggests to researches that perhaps it’s
something that can be corrected in everyone.
Whatever the cause may be, there is absolutely no doubt that dyslexia leads to many literacy problems within individuals and an insensitivity to sounds within a word, which in time will lead to problems with reading and reading comprehension. We also know that the causes of dyslexia can greatly vary from person to person which can make
treatment a bit more difficult.
Estimates of the inclusion of dyslexia vary immensely – from 4-10% of the population. It is believed to be four times more prevalent in males than females. Statistics in this area have been difficult to gather with great accuracy due to people not willing to admit to having a dyslexic problem.