There are many definitions of dyslexia. A
very simple one would be that dyslexia is a specific learning difficulty, which
makes it hard for some people to learn to read, write and spell correctly. The
recent Report of the Task Force on Dyslexia (2001) suggests the following more
scientific definition:
Dyslexia is manifested in a continuum of specific learning difficulties related to the acquisition of basic skills in reading, spelling and/or writing, such difficulties being unexplained in relation to an individual's other abilities and educational experiences. Dyslexia can be described at the neurological, cognitive and behavioural levels. It is typically characterised by inefficient information processing, including difficulties in phonological processing, working memory, rapid naming and automaticity of basic skills. Difficulties in organisation, sequencing and motor skills may also be present. (P.31)
The report goes on to say that the
learning difficulties arising from dyslexia:
A great deal of research has been done in
recent years on the cause of dyslexia and it may be that a great deal more
needs to be done before we have a definitive answer. We do know that
developmental dyslexia is an inherited, more common in male than females and
that one is born with it. While no conclusive research has been carried out in
Ireland to determine how prevalent it is, studies in other countries would
suggest that 6% to 8% of the population are likely to be affected. It would
seem that people with dyslexia share a cluster of genes, which may, it is
believed, account for the variations in the nature and extent of specific
learning difficulties.
Experts are not agreed, however, on the
underlying causes of dyslexia. Professor John Stein, Oxford, believes that
auditory and visual difficulties are caused by abnormal magnocellular
development. Malfunction in the development of sensory nerves happens at the
foetal stage and is said to cause eye convergence difficulties and inhibit
steady eye fixation. Other theorists consider that a phonological deficit is
the root cause of dyslexia. Evidence from brain imaging suggests that people
with dyslexia do not activate the left hemisphere (the language side) in the
brain as much when reading as non-dyslexic readers, and that there is less
engagement of the areas of the brain, which match letters with sounds. Yet
another view is that the role of the part of the brain that controls balance
(the cerebellum) is crucial and that differences in this area make it difficult
for children with dyslexia to acquire automaticity in tasks and may further
inhibit the development of language dexterity and motor skills.
Experts do agree that dyslexia describes
differences in the way in which the brain processes information, and while
there may be differences in the way in which the brain works, this does not
imply any abnormality, disease or defect.
Whatever the origins of the difficulty,
the truth is that children and adults with dyslexia learn differently. If this
difference is not accommodated within the school system, the child may have
difficulty in learning to read, write, spell and handle numbers. Some
difficulties will be mild and a child may cope without extra support. Others
are severe and the child will require specific help and tuition.
A problem learning to read and/or spell
should alert parents and teachers that a Specific Learning Disability may be
present. This applies particularly when a child's progress seems at odds with
his or her general level of ability.
A child with dyslexia may:
There is an old saying - "It's no disgrace to be
poor, but it's mighty inconvenient."
The same could be said of dyslexia. It is nothing to be ashamed of, but it does
complicate life. While there is no doubt that many people with dyslexia have
special gifts, and some of the common traits of dyslexia can be very useful,
nevertheless in a world where literacy is important, dyslexia air a definite
inconvenience. There is no denying that - but it is not the end of the world
either. It is very important for your child that you find a balance when
dealing with the subject.
If a diagnosis of dyslexia has been made
and your child needs to have extra tuition, within or outside of school, this
will need to be explained to the child very carefully. Again, the more
information you have the easier this will be. When explaining in dyslexia to
your child, you have to translate the results of the assessment into plain
language. You also want the child to know that dyslexia is nothing to be
ashamed of, that help is available, and that there is no reason why the child
should not achieve to his or her potential.