Describing the maturation of information processing in children is fundamental for developmental science. Although non-linear changes in reaction times have been well-documented, direct measurement of the development of the different processing components is lacking. In this study, electromyography was used to quantify the maturation of premotor and motor processes on a sample of 114 children (6-14 years-old) and 15 adults. Using a model-based approach, we show that the development of these two components is well-described by an exponential decrease in duration, with the decay rate being equal for the two components. These findings provide the first unbiased evidence in favour of the common developmental rate of nonmotor and motor processes by directly confronting rates of development of different processing components within the same task. This common developmental rate contrasts with the differential physical maturation of region-specific cerebral gray and white matter. Tentative paths of interpretation are proposed in the discussion.

中文翻译：

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成长过程中的加速：儿童和青春期运动和非运动过程的同步功能发展。

描述儿童信息处理的成熟是发展科学的基础。尽管反应时间的非线性变化已被充分记录，但缺乏对不同处理组件发展的直接测量。在这项研究中，肌电图用于量化 114 名儿童（6-14 岁）和 15 名成人样本的运动前和运动过程的成熟度。使用基于模型的方法，我们表明这两个组件的发展可以通过持续时间的指数减少来很好地描述，这两个组件的衰减率相等。这些发现通过直接面对同一任务中不同加工组件的发育速率，提供了第一个无偏见的证据，支持非运动和运动过程的共同发育速率。这种共同的发育速度与特定区域脑灰质和白质的不同物理成熟形成鲜明对比。讨论中提出了暂定的解释路径。