Aiming error under transformed spatial mappings suggests a structure for visual-motor maps.
Aiming error under transformed spatial mappings suggests a structure for visual-motor maps.
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DOI：
10.1037//0096-1523.15.3.493
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发表时间：
1989-08
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影响因子：
--
通讯作者：
H. Cunningham
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文献类型：
--
作者：
H. Cunningham
变换空间映射被用来扰乱正常的视觉运动过程，并揭示内部空间表征的结构所使用的电机控制系统。在旋转视觉运动映射下进行的2-D离散瞄准任务中，空间运动误差的模式对于所有Ss是相同的：旋转90度和135度之间的峰值误差和180度旋转的低误差。一个两个组件的空间表示，基于定向双向运动轴加上沿沿着这样的轴的行进方向，是假设的。在大于90度的旋转下观察到的运动方向逆转与假设的结构一致。与旋转不同，反射下的瞄准误差取决于相对于反射轴的运动方向（见坎宁安和帕维尔，出版中）。反应时间和运动时间的影响进行了观察，但速度-准确性的权衡，发现只有旋转的方向反转策略可以使用。最后，对旋转的适应在所有目标位置处同样地操作，但不改变不同旋转的相对难度。表示的结构属性在学习下是不变的。
Transformed spatial mappings were used to perturb normal visual-motor processes and reveal the structure of internal spatial representations used by the motor control system. In a 2-D discrete aiming task performed under rotated visual-motor mappings, the pattern of spatial movement error was the same for all Ss: peak error between 90 degrees and 135 degrees of rotation and low error for 180 degrees rotation. A two-component spatial representation, based on oriented bidirectional movement axes plus direction of travel along such axes, is hypothesized. Observed reversals of movement direction under rotations greater than 90 degrees are consistent with the hypothesized structure. Aiming error under reflections, unlike rotations, depended on direction of movement relative to the axis of reflection (see Cunningham & Pavel, in press). Reaction time and movement time effects were observed, but a speed-accuracy tradeoff was found only for rotations for which the direction-reversal strategy could be used. Finally, adaptation to rotation operates at all target locations equally but does not alter the relative difficulty of different rotations. Structural properties of the representation are invariant under learning.