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Dyslexia In Chinese Children Harder To Treat, Say Researchers
The differences can be seen in the brain and in the performance of Chinese children on visual and oral language tasks.
According to Wai Ting Siok of the University of Hong Kong, English dyslexia consists of a "phonological disorder," meaning that people with the condition have trouble detecting or manipulating the sound structure of oral language, which in turn leads to problems in mapping speech sounds onto letters.
However, in contrast, the new findings show that developmental dyslexia in Chinese is really two disorders: a visuospatial deficit and a phonological disorder combined.
"In English, the alphabetic letters that form visual words are pronounceable, so access to the pronunciation of English words is made possible by using letter-to-sound conversion rules," said Siok.
"Written Chinese maps graphic forms-i.e., characters-onto meanings; Chinese characters possess a number of intricate strokes packed into a square configuration, and their pronunciations must be memorized by rote.
"This characteristic suggests that a fine-grained visuospatial analysis must be performed by the visual system in order to activate the characters' phonological and semantic information.
"Consequently, disordered phonological processing may commonly coexist with abnormal visuospatial processing in Chinese dyslexia," Siok added.
During the study, the researchers asked normal and dyslexic Chinese readers to judge the physical size of visual stimuli and found that normal readers performed significantly better than dyslexic readers.
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More News on: Dyslexia, Development Milestone, Height and Weight-Kids, Aspergerīs Syndrome, Dyscalculia / Learning Disabilities
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