Hsieh Tsung-Yu, Pacheco Matheus Maia, Newell Karl M
Department of Kinesiology, The Pennsylvania State University, USA.
Department of Kinesiology, The Pennsylvania State University, USA.
Hum Mov Sci. 2015 Dec;44:201-10. doi: 10.1016/j.humov.2015.09.005. Epub 2015 Sep 21.
The experiment reported was set-up to investigate the space-time entropy of movement outcome as a function of a range of spatial (10, 20 and 30 cm) and temporal (250-2500 ms) criteria in a discrete aiming task. The variability and information entropy of the movement spatial and temporal errors considered separately increased and decreased on the respective dimension as a function of an increment of movement velocity. However, the joint space-time entropy was lowest when the relative contribution of spatial and temporal task criteria was comparable (i.e., mid-range of space-time constraints), and it increased with a greater trade-off between spatial or temporal task demands, revealing a U-shaped function across space-time task criteria. The traditional speed-accuracy functions of spatial error and temporal error considered independently mapped to this joint space-time U-shaped entropy function. The trade-off in movement tasks with joint space-time criteria is between spatial error and timing error, rather than movement speed and accuracy.
所报告的实验旨在研究离散瞄准任务中运动结果的时空熵，该熵是一系列空间（10厘米、20厘米和30厘米）和时间（250 - 2500毫秒）标准的函数。分别考虑的运动空间和时间误差的变异性和信息熵，在各自维度上随着运动速度的增加而增加和减少。然而，当空间和时间任务标准的相对贡献相当时（即时空约束的中间范围），联合时空熵最低，并且随着空间或时间任务需求之间更大的权衡而增加，揭示了跨时空任务标准的U形函数。独立考虑的空间误差和时间误差的传统速度 - 准确性函数映射到这个联合时空U形熵函数。具有联合时空标准的运动任务中的权衡是在空间误差和时间误差之间，而不是运动速度和准确性之间。
