After conducting longitudinal research plus numerous studies on genetics, interventions, and brain function, we now have a great deal of independent, scientific, replicated, published research on dyslexia. This section shares the research results released by the National Institutes of Health from to the present, as well as from dyslexia researchers in several others countries. How many children are learning disabled?
A child with dyslexia may have more difficulty than usual in reading, spelling, and concentrating. Specialist doctors and researchers are not precisely sure what causes dyslexia. Some evidence points to the possibility that the condition is genetic, as it often runs in families.
Two key factors appear to be: A team at the Yale School of Medicine found that defects in a gene, known as DCDC2were associated with problems in reading performance.
A small minority of people with dyslexia acquire the condition after they are born, usually due to a brain injury, strokeor some other type of trauma.
According to the University of Michigan Health System, dyslexia is the most common learning disability. The International Dyslexia Association estimates that 15 to 20 percent of the American population has some of the symptoms of dyslexia, including slow or inaccurate reading, poor spelling, poor writing, or mixing up similar words.
Dyslexia affects people of all ethnic backgrounds, although a person's native language can play an important role. A language where there is a clear connection between how a word is written and how it sounds, and consistent grammatical rules, such as Italian and Spanish, can be easier for a person with mild to moderate dyslexia.
Languages such as English, where there is often no clear connection between the written form and sound, as in words such as "cough" and "dough," can be more challenging for a person with dyslexia.
This table will show how the condition presents at different stages of life. However, the following categories are sometimes used: The person has difficulty breaking down words into smaller units, making it hard to match sounds with their written form.
This is also known as dysphonetic dyslexia or auditory dyslexia. The person cannot recognize a word by sight, making words hard to remember and learn. This is sometimes called dyseidectic dyslexia or visual dyslexia.
The person cannot quickly name a letter or number when they see it. The person finds it hard to isolate sounds also to name letters and numbers. The person has an unusual visual experience when looking at words, although this can overlap with surface dyslexia.
Sometimes people refer to "directional dyslexia," meaning it is difficult to tell left from right.
This is a common feature of dyslexia, but it is not a type. If a person has difficulty with math learning, the correct term for this is dyscalculia.
It is not dyslexia.Dyslexia: A specific developmental disability that alters the way the brain processes written material. Because dyslexia is due to a defect in the brain's processing of graphic symbols, it is thought of primarily as a learning disability.
The effects of dyslexia vary from person to person. The only. Frequently Asked Questions About Dyslexia. The information below has been adapted from Developmental Dyslexia (), a SPELD SA information sheet written by Rose Price and Karen Hodson, Adelaide psychologists, and Dyslexia – Action Plans for .
Revised Definition from the International Dyslexia Association Dyslexia is a neurologically-based, often familial, disorder which interferes with the acquisition and processing of language.
Varying in degrees of severity, it is manifested by difficulties in receptive and expressive language, including phonological processing, in reading.
dyslexia - Translation to Spanish, pronunciation, and forum discussions. Dyslexia is a hidden disability thought to affect around 10% of the population, 4% severely. It is the most common of the Specific Learning Difficulties (or differences), a family of related conditions with considerable overlap or co-occurrence.
Welcome. This free resource provides information for teachers, schools and local authorities on inclusive practice, literacy difficulties and dyslexia.