There are many definitions of Dyslexia so we include a few of the most authoritative
From the British Dyslexia Association site. Dyslexia is a specific learning difficulty
which mainly affects the development of literacy and language related skills. It
is likely to be present at birth and to be lifelong in its effects. It is characterised
by difficulties with phonological processing, rapid naming, working memory, processing
speed, and the automatic development of skills that may not match up to an individual’s
other cognitive abilities
From the Rose report June 2009● Dyslexia is a learning difficulty that primarily
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.and It is best thought
of as a continuum, not a distinct category;there are no clear cut-off points.
The World Health Organisation (1968) "A disorder manifested by difficulty learning
to read, despite conventional instruction, adequate intelligence and sociocultural
opportunity. It is dependent upon fundamental cognitive disabilities which are frequently
of constitutional origin.