The breakdown of Fitts’ law in rapid, reciprocal aiming movements
The breakdown of Fitts’ law in rapid, reciprocal aiming movements
复制标题
费茨定律在快速、相互瞄准运动中的崩溃
DOI：
--
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发表时间：
2002
影响因子：
2
通讯作者：
J.E.J. Duysens
中科院分区：
文献类型：
--
作者：
B. Smits;G. P. V. Galen;J.E.J. Duysens
根据费茨定律，在各种离散瞄准运动中存在速度-精度权衡。然而，这是未知的，是否同样的规律适用于循环瞄准运动。在本研究中，离散与循环瞄准运动之间的比较。一组24名健康的参与者在12个不同的目标任务，其中连续的手指和手腕的运动被强调，连续执行离散和循环运动，并在三个目标的宽度不同的图形笔运动。在循环条件下，瞄准运动包括来回运动，立即连续进行20 s。在离散条件下，来回瞄准运动被画成20个单笔划，开始后的信号，并在到达目标区域后停止。目标具有不同水平的空间准确性，并且运动具有不同的方向（从左下到右上;从右下到左上），主要引起手腕或手指运动。研究了每单位时间处理的信息量（每秒比特数;性能指数，IP）、切向速度、笔压力和峰值与平均速度之比，以了解离散和循环运动之间的控制差异。结果发现，IP和运动速度几乎是两倍大，在循环与离散运动。相比之下，循环运动中的轴向注射笔压力和峰值与平均速度的比值要低得多（1.24 N与0.94 N; 2.26 N与1.81 N）。我们的研究结果表明，预测的恒定IP不适用于快速循环瞄准运动，速度-精度权衡是不同的。它的结论是，周期性运动利用神经运动系统的能量和生理特性。与离散和循环瞄准运动相关的脑活动的预期差异进行了讨论，以及几个神经生理机制，预测更多的经济力招聘和信息处理循环比离散运动。
According to Fitts’ law, there is speed-accuracy trade-off in a wide variety of discrete aiming movements. However, it is unknown whether the same law applies to cyclic aiming movements. In the present study, a comparison is made between discrete versus cyclic aiming movements. A group of 24 healthy participants made graphical pen movements in 12 different aiming tasks in which successive finger and wrist movements were emphasized, consecutively executed as discrete and cyclic movements and varying in three target widths. In the cyclic condition, aiming movements consisted of back-and-forth movements that were performed in immediate succession for 20 s. In the discrete condition, back-and-forth aiming movements were drawn as 20 single strokes, starting after a go signal and stopping after reaching the target area. The targets had various levels of spatial accuracy and the movements had different directions (from lower left to upper right; from lower right to upper left) elicit either predominantly wrist or finger movements. The amount of information processed per unit of time (bits per second; index of performance, IP), tangential velocity, the pen pressure, and the ratio of peak-over-mean velocity were studied to gain understanding about the differences in control between discrete and cyclic movements. It was found that the IP and movement velocity were almost twice as large in cyclic versus discrete movements. In contrast, the axial pen pressure and the ratios of peak-over-mean velocity were much lower in cyclic movements (1.24 N versus 0.94 N; 2.26 N versus 1.81 N). The results of our study indicate that the predicted constant IP does not hold for rapid cyclic aiming movements and that speed-accuracy trade-off is different. It is concluded that cyclic movements exploit the energetic and physiological properties of the neuromotor system. Expected differences in brain activity related to discrete and cyclic aiming movements are discussed as well as several neurophysiological mechanisms, which predict more economic force recruitment and information processing in cyclic than in discrete movements.
DOI：
10.1097/00002517-199212000-00002
发表时间：
1992-12-01
期刊：
JOURNAL OF SPINAL DISORDERS
影响因子：
--
作者：
PANJABI, MM
通讯作者：
PANJABI, MM
影响因子：
2.5
作者：
Winstein, CJ;Grafton, ST;Pohl, PS
通讯作者：
Pohl, PS