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Abstract：
Developmental dyscalculia (DD) is characterized by insufficient mathematical learning ability and weaker mathematical performance than peers who are developmentally typical. As a subtype of learning disability, developmental dyscalculia contributes to deep cognitive processing deficits, mainly manifested as a lack of numerical processing ability. This study utilized event-related potentials (ERPs) technology to examine the negative priming effects (NP) between children with and without DD. Behaviorally, trends in mean reaction time (RT) were consistent between children with and without DD under prime and control conditions. The developmental dyscalculia group and the typical developmental (TD) children group showed a significant negative priming effect. However, the magnitude of the NP was significantly different between two groups, with the magnitude being significantly higher in the TD group than the DD group. In terms of the ERPs results, there were significantly larger amplitudes of P100, P200, and P300 in the TD group than that of children with DD. At the same time, in the DD group, N100 and P300 latency were significantly delayed in some electrodes than the TD group. The results indicated that there were characteristic inhibition deficits in children with DD. Inhibition defects in children with DD might be the underlying cause of the development of digital processing ability of children with DD.
摘要：
发展性计算障碍（DD）的特征是数学学习能力不足，数学表现比典型的同龄人弱。作为学习障碍的一种亚型，发育性计算障碍有助于深度认知加工缺陷，主要表现为缺乏数值加工能力。这项研究利用事件相关电位（ERP）技术来检查有和没有DD的儿童之间的负启动效应（NP）。行为上,在主要和对照条件下，有和没有DD的儿童的平均反应时间（RT）趋势一致。发育性计算障碍组和典型发育（TD）儿童组显示出显着的负启动作用。然而,两组之间NP的大小有显著差异，TD组的幅度明显高于DD组。就ERP结果而言，TD组的P100，P200和P300的振幅明显大于DD儿童。同时,在DD组中，N100和P300在某些电极中的潜伏期比TD组明显延迟。结果表明，DD儿童存在特征性的抑制缺陷。DD儿童的抑制缺陷可能是DD儿童数字处理能力发展的根本原因。
