Re-acquisition of ballistic arm movements under the visually transposed condition

1997年8月，我进行了一项为期两周的规模实验，其中一名受试者戴着左右视觉反转护目镜，并在此期间进行日常生活。利用6个直角亚克力棱镜制作左右翻转护目镜，可实现110度水平宽视场，实验中介绍了录像数据的运动分析系统。通过每隔33毫秒对视频图像进行采样，可以跟踪受试者手臂对视觉或听觉目标的运动。分析的一个重要结果是对视觉目标和听觉目标的到达行为的差异：随着适应的进行，视觉目标条件下的任务可以正确地完成到物理目标上。另一方面，由于听觉定位的不确定性，对听觉目标的定位任务变得越来越困难。另一个重要的结果是，在视觉信息颠倒的水平维度上，手臂对目标运动的弹道特征被中断，而在没有被转置护目镜转位的此处-那里维度，手臂的弹道运动被保留下来。这些模式是在视觉遮挡条件下观察到的，在这种情况下，当受试者从休息(开始)位置离开手时，液晶玻璃立即遮挡了受试者前面的视觉。虽然受试者可能不会受到当前视觉信息的干扰(因为视觉遮挡)，但弹道特征仅在左右维度中断。

In August 1997, I conducted a two-week scale experiment, in which a subject wore the left-right visually reversing goggles and doing daily life during the period. The horizontal wide field of vision, 110 degree could be realized by making the left-right reversal goggles from six right-angle acrylic prisms.The motion analysis system for video-recorded data was introduced in the experiment. By sampling the video images every 33 msec, the subject's arm movements to a visual or auditory target were traced. One of the most important results from the analysis is the difference of the reaching behavior between to the visual target and to the auditory target : As the adaptation progressed, the tasks in the visual target condition could be performed correctly to the physical target. On the other hand, the task to an auditory target became more and more difficult to perform because of the uncertainty of auditory localization. Another important result was that the ballistic characteristics of the arm movements to the target were interrupted in the horizontal dimension in which visual information was reversed, while in the here-there dimension which was not transposed by the transposing goggles, the ballistic arm movements were preserved. These patterns were observed in the vision occlusion condition in which when the subject left the hand from the resting (starting) position, a liquid crystal glass immediately occluded the vision in front of the subject. Although the subject might not disturbed by the current visual information (because of occlusion of vision), the ballistic characteristics were interrupted only in the left-right dimension.