漢語發展性閱讀障礙(DD)兒童在快速命名(RAN)任務中會表現出顯著缺陷,從眼動加工的視角,其成因主要存在兩種觀點,即副中央凹加工困難和中央凹-副中央凹困難。本研究運用眼動追蹤技術,實驗1將邊界范式與單項RAN結合,操縱預視時間和預視類型,探究漢語DD兒童在單項RAN中的副中央凹預視效應,結果并未發現漢語DD兒童表現出副中央凹加工困難。實驗2將邊界范式與系列RAN結合,對預視類型進行操縱,探究漢語DD兒童在系列RAN中的副中央凹預視效應,結果表明漢語DD兒童與正常兒童的副中央凹預視效應存在差異,同時表現出顯著的RAN缺陷。這證明了漢語DD兒童的RAN缺陷由中央凹與副中央凹共同作用導致。

Rapid automatized naming(RAN) deficit is a dominant deficit of Chinese developmental dyslexic(DD). Two hypotheses have been put forward to account for the RAN dysfunction in dyslexic: parafoveal processing difficulty and foveal-parafoveal difficulty. In Experiment 1, the boundary paradigm was used in discrete RAN to investigate whether Chinese dyslexic had parafoveal processing deficit in discrete RAN while participants’ eye movements were recorded. Three groups of children were selected as participants, i.e.,children with DD, chronological age-matched children(CA), and reading level-matched children(RL). In Experiment 1, preview time and the type of preview were manipulated. The results showed that there was no evidence demonstrating that Chinese children with DD had parafoveal processing difficulty in RAN task. In Experiment 2, the boundary paradigm was used in serial RAN such that the preview information was presented firstly and target characters appeared only when the foveal processing started. We found significant phonological and orthographical priming effects for all three groups of child participants. Children with DD had clear RAN deficit with larger preview effects. Taken together, we argue that the RAN deficit of DD is caused by their foveal-parafoveal difficulty.