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題名 | 中文閱讀障礙視知覺缺陷探究:文字辨認與視覺離心作用=On the Visual Processing Deficits of Chinese Dyslexia: Word Recognition and Visual Eccentricity |
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作 者 | 楊憲明; | 書刊名 | 特殊教育研究學刊 |
卷期 | 21 2001.07[民90.07] |
頁次 | 頁189-213 |
分類號 | 529.69 |
關鍵詞 | 閱讀障礙; 文字辨認; 視知覺缺陷; 視覺離心; 視網膜中心近側區域; Dyslexia; Word recognition; Visual-processing deficit; Visual eccentricity; Parafoveal area; |
語文 | 中文(Chinese) |
中文摘要 | 本研究旨在探討中文閱讀障礙的視知覺機制缺陷,及其與中文文字獨特表徵的可能關係。研究者比較閱讀障礙怕和一般閱讀能力者,在上、下視覺區不同視覺離心位置上不同類別字元的文字辨認正確率,以推測閱讀障礙者的視知覺處理缺陷。研究發現,中文閱讀閱礙者與一般閱讀能力者,對於不同使用頻次與結構複雜度字元的辨認,在視網膜中心區志,辨認正確率並無顯著的差異。但是在視網膜中心近側區域時,對於高結構複雜度字元的辨認,閱讀障礙者的辨認正確率,則顯著地低於一般閱讀能力者。這項研究發現,亦獲得受試者實驗反應資料的數學預測模式參數比較的支持。研究者根據所獲得之高預測量二次曲線模式,比較閱讀障礙者與一般閱讀能力者預測模式裡各參數係數的差異。研究發現,視覺離心對文字辨認所泄生的不利影響,在閱讀障礙者與一般閱讀能力者,並不相等,在閱讀障礙者較高,在一般閱讀能力者較低;再者,參數係數比較也發現,字元結構複雜度對文字辨認所產生的不利影響,再閱讀障礙者較高,在一般閱讀能力者較低。以上結果暗示,中文閱讀障礙的發覺,與「視網膜中心近側區域高結構複雜度字元」的視知覺處理缺陷,有十分密切的關連。 |
英文摘要 | The study was conducted to address visual processing deficits of Chinese dyslexia, and the relation of the deficits to specific features of Chinese words. Dyslexics and normal readers were required to recognize Chinese words of different usage-frequency and structural complexity, which were presented in different visual eccentric positions in the upper and lower visual fields of the retina. Performance on word recognition was analyzed to explore visual processing deficits that may lead to dyslexia. The results of the study showed that in the center of the retina, dyslexics and normal readers showed comparable performance on the recognition of words across frequency-complexity categories. However, in the parafoveal area of the retina, the probabilities of correct recognition of words of high structural-complexity were significantly lower in dyslexics than in normal readers. A quadratic mathematical model, which displayed a high degree of account of variance of subjects' performance, revealed similar patterns of results. The analyses showed the effect of visual eccentricity on correct recognition of words is significantly higher for dyslexics than for normal readers. Further, the structural complexity of words produced a negative effect on correct recognition of words that was more for dyslexics than for normal readers. It was suggested that the occurrence of Chinese dyslexia may be highly associated with visual processing deficits that are associated with parrfoveal processing of high structural-complexity words. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。