Discuss at least one possible cause of a named learning difficulty other than autism (e.g. dyslexia, dyscalcylia). Refer to evidence in your answer (12 marks)

One possible cause of dyslexia is that it emanates from neurological (brain) factors. This is a biological explanation. There is some evidence that dyslexic people share a group of genes on part of chromosome 6 which is close to the MHC genes that control the immune system. This idea is supported by the evidence that dyslexics often tend to suffer from disorders of the immune system such as asthma and rhemutoid arthritis. One theory which attempts …

…also be damaged in the foetus, which would lead to delays in sound processing. Research that supports this idea comes from Witton who found that people who have trouble processing quick changing visual signals will also have trouble in processing fast changing sounds - this correlates to a person's ability to spell and read. Although there is much evidentiary support for sensory deficits occurring in dyslexic people it is still unclear why these deficits occur.