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A pilot investigation into unimpaired and dyslexic Persian children's word naming and spelling: Implications for models of reading and counselling

There is now a growing body of research examining developmental dyslexia in different languages and writing systems. The phonologically transparent Persian orthography is normally transcribed with two distinct spellings, words spelled with vowels (letters) transcribed as a fixed part of the spelling (transparent) and words spelled with vowels (diacritics) omitted (opaque). This peculiarity of Persian would enable one to examine the impact of transparency, as well as the possible psychological factors associated with verbal punishment in Persian schools on the development of reading and spelling. Twenty-nine Persian children (22 male and 7 female) classified as being developmentally dyslexic (mean age 9.4, SD = 1.4) were compared with 49 unimpaired male children (mean age 9, SD = 1.3) on two main aspects of reading Persian opaque and transparent spellings, namely: Spelling and word naming. The results showed an expected impairment on all aspects of reading between unimpaired and children with dyslexia. However, performance of both groups of participants was impaired when performing tasks with opaque as opposed to transparent spellings. There was also a strong correlation between the recorded number of times the dyslexic child was verbally punished and the number of errors on the spelling and naming of transparent and opaque words. These results are supportive of the impact of spelling transparency, as well as psychological variables as factors in the development of reading and spelling.