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[Vol.24 No.4 contents]
Japanese/English
Full Text of this Articlein Japanese PDF (517K) |
| ArticleTitle | Research criteria for Japanese developmental dyslexia |
| Language | J |
| AuthorList | Ryusaku Hashimoto1)2), Mitsuru Kashiwagi1), Shuhei Suzuki1) |
| Affiliation |
1)Department of Developmental Brain Science, Osaka Medical College 2)Japan Society for the Promotion of Science, Department of Pediatrics, Osaka Medical College |
| Publication | Japanese Journal of Neuropsychology: 24 (4), 258-265, 2008 |
| Received | Dec 13, 2007 |
| Accepted | Apr 14, 2008 |
| Abstract | We proposed research criteria for Japanese developmental dyslexia and examined its utilities in this paper. Nine healthy children and 20 children with developmental disorders participated in this study. We classified the children with developmental disorders as non-fluent children, when they showed significant delay at least in two tests out of the three reading tests; the serial hiragana reading test, word and non-word tasks in the rapid word reading test. According to the test criteria, they were assigned into two groups: 10 non-fluent children and 10 fluent children. Firstly, we compared the scores of Raven's coloured progressive matrices (RCPM), Token test for children, and the screening test of reading and writing for Japanese primary school children (STRAW) among the healthy, non-fluent and fluent groups. There were no statistical differences in the age and the score of RCPM among the three groups. Only the scores of kanji reading and writing task (STRAW) and the reading comprehension (Token test) were significantly low in the non-fluent group. Secondly, we compared the developmental history among the groups. Most parents of non-fluent children reported the lack of interest against letters in preschool age, and the difficulties in mastering hiragana and kanji during the 1st grade of elementary school. These cognitive features and their developmental histories of non-fluent group were consistent with those of the reported developmental dyslexia. Therefore, we suggest combined use of reading test criteria and developmental history. It is useful as the research criteria for Japanese developmental dyslexia. |
| Keywords | developmental dyslexia, research criteria, reading speed, developmental history |
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