Hsieh Tsung-Yu, Liu Yeou-Teh, Newell Karl M
National Taiwan Normal University, Taipei, Taiwan.
University of Georgia, Athens, Georgia, United State of America.
PLoS One. 2017 Dec 27;12(12):e0189328. doi: 10.1371/journal.pone.0189328. eCollection 2017.
There is preliminary evidence that there are several types of submovements in movement aiming that reflect different processes of control and can result from particular task constraints. The purpose of the study was to investigate the effect of movement space and time task criteria on the prevalence of different submovement control characteristics in discrete aiming. Twelve participants completed 3 distance x 5 time conditions each with 100 trials in a target-aiming movement task. The kinematic structure of the trajectory determined the prevalence of 5 submovement types (none; pre-peak, post-peak movement velocity; undershoot, overshoot). The findings showed that the overall number of submovements increased in the slower space-time conditions and was predominantly characterized by post-peak trajectory submovements rather than discrete overshoot submovements. Overshoot submovements were more frequent in the high average movement velocity and short time duration conditions. We concluded that there are qualitatively different distributional patterns of submovement types in discrete aiming tasks that are organized by the quantitative scaling of the average movement velocity arising from multiple control processes to meet the specific space-time task constraints.
有初步证据表明，运动瞄准中存在几种子运动类型，它们反映了不同的控制过程，并且可能由特定的任务限制导致。本研究的目的是调查运动空间和时间任务标准对离散瞄准中不同子运动控制特征发生率的影响。12名参与者在目标瞄准运动任务中完成了3种距离×5种时间条件，每种条件进行100次试验。轨迹的运动学结构决定了5种子运动类型（无；峰值前、峰值后运动速度；下冲、过冲）的发生率。研究结果表明，在较慢的时空条件下，子运动的总数增加，并且主要特征是峰值后轨迹子运动，而不是离散的过冲子运动。在高平均运动速度和短持续时间条件下，过冲子运动更频繁。我们得出结论，在离散瞄准任务中，子运动类型存在质的不同分布模式，这些模式由多个控制过程产生的平均运动速度的定量缩放组织，以满足特定的时空任务限制。
