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The original dyslexia checklist dates back to
the mid-1980's, when Jo Matty and Harry Chasty devised a checklist
for the British Dyslexia Association based on experience. This was
subsequently modified for research purposes by Michael Vinegrad,
who tested a large number of individuals in a higher education institution.
His results were published in Educare, No 48, March 1994.
The current checklist has taken the earlier version, expanding
the number of questions, and put them into a theoretical framework.
This work is still at the research level, but it is hoped that,
given enough data, a valid, reliable checklist will be provided
which will help pinpoint not only areas of difficulty, but also
suggest preferred learning styles.
The theoretical framework is that dyslexia may be caused by a combination
of phonological segmentation and assembly skills, and visual and
auditory system deficits. Word retrieval and speed of processing
difficulties may also be present. A number of possible underlying
biological causes of these cognitive deficits have been identified,
and it is probable that in any one individual there may be several
causes.
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