a quick thought on dyslexia

May 24, 2007

While copying some text and numbers from a printed page into a Word document (and getting a few of the words and numbers mixed up along the way), it made me think about dyslexia in relation to synesthesia.

I don’t have dyslexia myself (I think my brain was just refusing to work today) but I wonder if there are any synaesthetes – I’m talking about grapheme-colour synaesthetes mainly – who are also dyslexic. There must be some out there, and if so, how do they experience colours in response to letters and words? Is there a difference compared to how a non-dyslexic synaesthesia would see them?

According to Dyslexia Action, Dyslexic people usually find it difficult to analyse and work with the sounds of spoken words, and many have difficulties with short-term memory, sequencing and organisation. This means that it is more difficult for them to learn how spoken sounds map onto letters, which affects the ability to spell and the ability to decode or ‘sound out’ words.

If synaesthesia is combined with dyslexia, does it make it even harder to process language? Do the colours conflict with the letters in the words? Or alternatively, can the synaesthesia help with spelling?

These are questions I’ll never find the answers to unless I can find a dyslexic synaesthete, but I thought I’d write down my thoughts on it anyway.


conceptual responses

May 23, 2007

Further to my earlier post about the number-colour test, I have found some clarification in the most recent issue of New Scientist (19 May 07) which I purchased yesterday.

The test (or one very similar, it doesn’t specify) was carried out by a leading synaesthesia researcher called Vilayanur Ramachandran, and he found that there were two different types of grapheme-colour synaesthetes: those who actually see the colours on the page and those who see the colours in their mind’s eye. I am of the latter group (the ones who can’t pick the 2s from the 5s) which according to this article means that the concept of the letter, not just the sensory data, causes the synaesthetic response.

That sounds about right to me. It fits with my previous thoughts that the colour responses stem from learnt associations or connections in the brain.