ABSTRACT
The International Dyslexia Association (IDA) is a non-profit organisation based in Baltimore, Maryland, USA. It is considered the oldest and biggest non-profit dyslexia organisation in the world. On 12 November 2002, the IDA’s Board of Directors endorsed the following dyslexia definition : Dyslexia is a specific learning disability that is neurobiological in origin. The British Dyslexia Association (BDA) is one of the oldest non-profit dyslexia association in the UK. The BDA has adopted the following definition of dyslexia : Dyslexia is a learning difficulty that primarily affects the skills involved in accurate and fluent word reading and spelling. Characteristic features of dyslexia are difficulties in phonological awareness, verbal memory and verbal processing speed. Dyslexia occurs across the range of intellectual abilities. It is best thought of as a continuum, not a distinct category, and there are no clear cut-off points.
