The Scientific Definition of Dyslexia
“Dyslexia is a specific learning disability that is neurobiological in origin. It is characterized by difficulties with accurate and/or fluent word recognition and by poor spelling and decoding abilities. These difficulties typically result from a deficit in the phonological component of language that is often unexpected in relation to other cognitive abilities and the provision of effective classroom instruction. Secondary consequences may include problems in reading comprehension and reduced reading experience that can impede growth of vocabulary and background knowledge.”
Adopted by the IDA Board of Directors, Nov. 12, 2002. This Definition is also used by the National Institute of Child Health and Human Development (NICHD). Many state education codes, including New Jersey, Ohio and Utah, have adopted this definition. Learn more about how consensus was reached on this definition: Definition Consensus Project.
What is Dyslexia?
From the National Center for Learning Disabilities (NCLD) website, Dyslexia is described as follows:
"As with other learning disabilities, dyslexia is a lifelong challenge that people are born with. This language processing disorder can hinder reading, writing, spelling, and sometimes even speaking. Dyslexia is not a sign of poor intelligence or laziness. Children and adults with dyslexia simply have a neurological difference that causes their brains to process and interpret information atypically.
Dyslexia occurs among people of all economic and ethnic backgrounds. Often more than one member of a family has dyslexia. According to the National Institute of Child and Human Development, as many as 15 percent of Americans have major troubles with reading.
Much of what happens in a classroom is based on reading and writing. So it's important to identify dyslexia as early as possible. Using alternate learning methods, people with dyslexia can achieve success."
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