Smeets Jeroen B J, Louw Stefan
Faculteit Bewegingswetenschappen, Vrije Universiteit, Amsterdam, Netherlands.
J Exp Psychol Hum Percept Perform. 2007 Feb;33(1):246-9; discussion 250-5. doi: 10.1037/0096-1523.33.1.246.
It has been proposed that it is possible to decompose changes in variability of human motor behavior into 3 independent components: covariation, task tolerance, and stochastic noise (H. Müller & D. Sternad). The authors simulate learning to throw accurately and show that for this task the proposed analysis does not give an unambiguous answer to the question of what the 3 components contribute to the simulated skill improvement. It is argued that this is caused by the fact that the component covariation depends on the choice of control variables. The authors conclude that it is not possible to distinguish between the 3 components of noise reduction without knowing the controlled variables.
有人提出，可以将人类运动行为变异性的变化分解为3个独立的成分：协变、任务耐受性和随机噪声（H. 米勒和D. 斯特纳德）。作者模拟了学习精确投掷的过程，并表明对于这项任务，所提出的分析对于这3个成分对模拟技能提升的贡献问题并没有给出明确的答案。有人认为，这是由于协变成分取决于控制变量的选择这一事实导致的。作者得出结论，在不知道控制变量的情况下，不可能区分降噪的3个成分。
