左半球優勢在普通人群中很常見，並且非典型偏側化已被證實與閱讀困難等發展障礙有關。本研究透過功能性經顱都卜勒超音波檢查(fTCD)的語詞生成任務和聲韻覺識任務，調查台灣典型發展(N=18)和閱讀困難(N=18)兒童的聲韻覺識能力和大腦偏側化。結果顯示，典型發展組在兩項任務中都是左偏側化，但典型發展組和閱讀困難組在兩項任務的典型側化人數比例相似。至於與閱讀相關的聲韻覺識任務的偏側性指數，與群體層面的聲韻覺識能力之間沒有顯著相關。然而，當進一步將受試者依照閱讀困難與否和偏側化分為四組時我們發現了一些有趣的發現，左側化的典型發展兒童在聲韻覺識能力上優於左側化的閱讀困難兒童。總結來說，我們並沒有發現直接的證據證明典型∕非典型的偏側化與聲韻覺識能力間有特定的關聯。

Left hemispheric dominance is known to be common in the general population, and atypical lateralization was proven to relate to developmental disabilities such as reading difficulty. This study investigates phonological awareness abilities and cerebral lateralization in typically developing (TD, N=18) and reading difficulty (RD, N=18) children in Taiwan through word generation task and phonological awareness task by functional transcranial Doppler sonography (fTCD). The results showed that the TD group showed a general pattern of left-lateralization in both tasks, and similar results were observed in the RD group. As for the laterality index of the more reading-related phonological awareness task, there was no significant relationship between the abilities of phonological awareness at the group level. Nevertheless, several interesting findings were found when divided into four groups by the development and lateralization. In summary, we found no direct evidence that there is a specific relationship between typical/atypical lateralization and phonological awareness ability.

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