A Method for Identifying the Initiation of Reaching Movements in Natural Prehension.
A Method for Identifying the Initiation of Reaching Movements in Natural Prehension.
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一种识别自然感知中伸手运动起始的方法。
作者：
D. Corbetta;E. Thelen
识别运动的开始对于计算运动持续时间、运动速度或轨迹长度和直线度等变量至关重要。在大多数实验中，通过向受试者提供指示并限制任务来简化问题。这在太年轻或残疾的人群中是不可能的，他们无法理解并按照指示执行任务。在这篇文章中，提出了一种方法，可靠地识别婴儿，其运动是嵌入在他们正在进行的活动的发病达到。一个计算机程序提示用户选择达到启动的基础上，手运动学和录像行为之间的比较，并从4个运动环境中出现的代码达到。该方法在所有年龄段的婴儿中都是高度可靠的，并捕捉了预期的与年龄相关的伸手变化。建议研究人员可以使用这种或类似的方法来研究正常和临床人群中自然持续活动的一部分
Identifying the start of a movement is critical for calculating variables such as movement duration, movement speed, or trajectory length and straightness. In most experiments, the problem is simplified by giving instructions to the subjects and by constraining the task. This is not possible in populations that are too young or disabled to understand and execute the task as instructed. In this article, a method is presented for reliably identifying the onset of reaches in infants, whose movements are embedded in their ongoing activities. A computer program prompts the user to choose reach initiation on the basis of comparison between hand kinematics and videotaped behavior and to code the reach as emerging from 1 of 4 movement contexts. The method is highly reliable in infants of all ages and captures expected age-related changes in reaching. It is suggested that researchers could use this or a similar method to study movements that are part of natural, ongoing activities in normal and in clinical populations