Reducing
the barriers for a Dyspraxic student
I
recently worked with a Dyspraxic student looking at ways to reduce the
difficulties/ barriers she experiences with text/reading/writing.
The
student has been diagnosed as Dyspraxic,
not dyslexic.
There
appears to be visual processing components to the barriers that………………
experiences.
By
optimising the following aspects of the computer screen we were able to reduce/remove
these barriers.
Font size……Increase needed.
Screen brightness/
ambient lighting…..Reduction
in ambient lighting and screen brightness.
Screen background ‘colour’….. Precise, slight
reduction in green pixel brightness compared with red and blue.
These
I believe compound the issue of her convergence
‘difficulties at near’; that are associated with her very strong
correction for near vision which probably leads to her needing to be too
close to the screen/ text when reading/writing, as if she is ‘short-sighted’.
The intermittent alternate
monocular visual suppression which is the visual system’s response to this
would exacerbate her dyspraxia. There would be an associated clumsiness when
reading or for 30 seconds to a minute after reading as ‘distance judging for
fine motor activities would be compromised. More demand would be made for
accurate Cerebellar calculations in terms of muscle tone management.
The
viewing distance is possibly not actually a direct association with the long
sight correction but in order to ensure that the image size on her retinas is
an appropriate to maximise her ‘visual attention span’. Raising the font
would increase the this optimal viewing distance, reduce the convergence/fusion
problems and hence give rise to increased fluency, reduced demand on
working memory and increased reading stamina.
It
is also likely that the substantially reduced ambient lighting (from the wraparound
shades) will increase the pupil diameter, contributing to and assisting the
reduced background brightness which allows optimisation of the edge detection
data process.
There
was a slight but precise adjustment to the ‘colour of the background which
further contributed to the barrier reduction.
Please
note each of these comments is based on measured responses to changes in the
viewing parameters.
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