Self-motion perception during a sequence of whole-body rotations in darkness
Self-motion perception during a sequence of whole-body rotations in darkness
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DOI：
10.1007/s002210000415
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发表时间：
2000-09-01
影响因子：
2
通讯作者：
Berthoz, A
中科院分区：
文献类型：
--
作者：
Siegler, I;Viaud-Delmon, I;Berthoz, A
这项研究的主要目的是检查在黑暗中被动全身旋转所引起的旋转后效应如何改变随后旋转过程中对运动和眼球运动的感知。在一项再现任务中评估了角度大小的感知：蒙上眼睛的受试者首先在移动机器人上围绕地球垂直轴被动旋转。然后他们被要求用操纵杆控制机器人来重现这个角度。刺激旋转从80度到340度不等。受试者被给予两种延迟指令中的一种：在刺激结束后，他们要么必须等待旋转后感觉结束后才开始复制（无条件延迟，FD），要么必须在刺激旋转结束后立即开始（无延迟，ND）。FD的延迟被用作这些感觉主观持续时间的附带测量。用红外测量系统（IRIS）记录眼球运动。结果表明，在这两种情况下，受试者准确地再现了旋转角度，但他们没有再现刺激的动态。ND的峰值速度高于FD。这一差异表明，在ND条件下，旋转后效应诱导了对角速度的感知偏差。
The main aim of this study was to examine how postrotatory effects, induced by passive whole-body rotations in darkness, could alter the perception of motion and eye movements during a subsequent rotation. Perception of angle magnitude was assessed in a reproduction task: blindfolded subjects were first submitted to a passive rotation about the earth-vertical axis on a mobile robot. They were then asked to reproduce this angle by controlling the robot with a joystick. Stimulus rotations ranged from 80 degrees to 340 degrees. Subjects were given one of two delay instructions: after the stimulus, they either had to await the end of postrotatory sensations before starting reproduction (condition free delay, FD), or they had to start immediately after the end of the stimulus rotation (no delay, ND). The delay in FD was used as an incidental measure of the subjective duration of these sensations. Eye movements were recorded with an infrared measuring system (IRIS). Results showed that in both conditions subjects accurately reproduced rotation angles, though they did not reproduce the stimulus dynamics. Peak velocities reached in ND were higher than in FD. This difference suggests that postrotatory effects induced a bias in the perception of angular velocity in the ND condition.