Spontaneous bimanual independence during parallel tapping and sawing
Spontaneous bimanual independence during parallel tapping and sawing
复制标题
平行攻丝和锯切时自动双手独立
作者：
S. Starke;Chris Baber
复杂的多节奏的表演--左手和右手以不同的速度移动的节奏--通常是受过高度训练的人的领域。然而，通过触觉引导手部运动的研究表明，即使是新手也可以在没有或只有简短训练的情况下进行多节奏。在这项研究中，我们调查了新手是否能够用一只手敲匹配不同的速度的节拍器，而锯与另一只手。这个实验是基于这样一个假设，即锯的运动是以一个可预测的速度持续控制的，而不需要主要关注它。因此，有意识地用另一只手匹配不同的规定节拍器速度将导致多节奏的自发表现。六个实验条件是随机的：单手轻敲和锯以及四个双手条件，预期比例为1：1（使用和不使用匹配的节拍器）以及3：4和4：3（使用匹配的节拍器）。结果显示，参与者在单手和双手条件下以0.44 [0.20] s至0.51 [0.19] s的一致周期持续时间执行锯运动，条件对周期持续时间没有显著影响（p = 0.315）。同样，在0.48 [0.22] s的循环持续时间下执行自由攻丝。在双手条件下，我们发现，对于4：3的比率（每次测量4次敲击与3次锯切循环），观察到的和预测的比率0.75没有显著差异（p = 0.369），支持我们的多节律自发采用的假设。然而，对于3：4的比率（每次测量3次敲击与4次锯切循环），观察到的和预测的比率不同（p = 0.016），具有同步的趋势。我们的研究结果表明，双手独立执行复杂的多节律时，原则上可以实现，如果一只手的运动可以执行没有付出太多，如果有的话，注意到它。在这个范例中，小节奏的手臂运动可能是由一个内在的时间，导致自发收敛的周期持续时间约为0.5秒，而另一只手的运动可以被有意识地控制为以期望的速率发生。
The performance of complex polyrhythms—rhythms where the left and right hand move at different rates—is usually the province of highly trained individuals. However, studies in which hand movement is guided haptically show that even novices can perform polyrhythms with no or only brief training. In this study, we investigated whether novices are able to tap with one hand by matching different rates of a metronome while sawing with the other hand. This experiment was based on the assumption that saw movement is controlled consistently at a predictable rate without the need for paying primary attention to it. It would follow that consciously matching different stipulated metronome rates with the other hand would result in the spontaneous performance of polyrhythms. Six experimental conditions were randomised: single handed tapping and sawing as well as four bimanual conditions with expected ratios of 1:1 (performed with and without matching a metronome) as well as 3:4 and 4:3 (performed matching a metronome). Results showed that participants executed the saw movement at a consistent cycle duration of 0.44 [0.20] s to 0.51 [0.19] s across single and bimanual conditions, with no significant effect of the condition on the cycle duration (p = 0.315). Similarly, free tapping was executed at a cycle duration of 0.48 [0.22] s. In the bimanual conditions, we found that for a ratio of 4:3 (4 taps against 3 sawing cycles per measure), the observed and predicted ratio of 0.75 were not significantly different (p = 0.369), supporting our hypothesis of the spontaneous adoption of polyrhythms. However, for a ratio of 3:4 (3 taps against 4 sawing cycles per measure), the observed and predicted ratio differed (p = 0.016), with a trend towards synchronisation. Our findings show that bimanual independence when performing complex polyrhythms can in principle be achieved if the movement of one hand can be performed without paying much—if any—attention to it. In this paradigm, small rhythmic arm movements are possibly driven by an intrinsic timing which leads to spontaneous convergence on a cycle duration of around 0.5 s, while the movement of the other hand can be controlled consciously to occur at desired rates.
影响因子：
2.4
作者：
Siu, Ka-Chun;Woollacott, Marjorie H.
通讯作者：
Woollacott, Marjorie H.
触觉跟踪允许双手独立。
DOI：
10.1037/0096-1523.32.5.1266
发表时间：
2006
期刊：
Journal of experimental psychology. Human perception and performance
影响因子：
--
作者：
Rosenbaum,DavidA;Dawson,AmandaM;Challis,JohnH
通讯作者：
Challis,JohnH