Lafe Charley W, Pacheco Matheus M, Newell Karl M
Department of Kinesiology, 339 Ramsey Student Center, University of Georgia, Athens, GA, 30605, USA.
Exp Brain Res. 2016 Jul;234(7):2025-2034. doi: 10.1007/s00221-016-4606-8. Epub 2016 Mar 9.
The effect of the intermittency of visual information in the bimanual coordination of an isometric force coordination task was investigated as a function of criterion force level. Eight levels of visual information intermittency (.2-25.6 Hz) were used in blocked fashion at each force level. Participants were required to produce a constant force output matching as accurately as possible the criterion force target. The results showed that performance improved as the intermittency of visual information was reduced-this effect being a function of force level. The distribution of the relative phase through the trial revealed a preference for the two hands to be coupled together (in-phase) at the slower rates of visual presentation (~.2 Hz). However, as the rate of visual feedback was increased (up to ~25.6 Hz), there was a transition to predominantly a negative correlation pattern (anti-phase). The pattern of bimanual coordination in this isometric tracking task is driven by the availability of information for error correction and the interactive influence of perceptual-motor constraints.
研究了等长力协调任务的双手协调中视觉信息间歇性的影响，并将其作为标准力水平的函数进行研究。在每个力水平下，以分组方式使用了八个视觉信息间歇性水平（0.2 - 25.6赫兹）。参与者需要产生恒定的力输出，尽可能精确地匹配标准力目标。结果表明，随着视觉信息间歇性的降低，表现有所改善——这种效应是力水平的函数。整个试验过程中相对相位的分布表明，在较慢的视觉呈现速率（约0.2赫兹）下，双手倾向于耦合在一起（同相）。然而，随着视觉反馈速率的增加（高达约25.6赫兹），会过渡到主要为负相关模式（反相）。这种等长跟踪任务中的双手协调模式是由用于误差校正的信息可用性以及感知 - 运动约束的交互影响驱动的。
