Egocentric perception through interaction among many sensory systems
Egocentric perception through interaction among many sensory systems
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DOI：
10.1016/s0926-6410(96)00044-4
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发表时间：
1996-12-01
期刊：
影响因子：
--
通讯作者：
Ohmi, M
中科院分区：
文献类型：
--
作者：
Ohmi, M
我们通过视觉、本体感觉和前庭感觉等多种感官感知自我中心的位置和速度。正常情况下，这些感官传递的信息是和谐的。然而，也存在信息不和谐的情况。当我们观看宽屏显示器或乘坐加速或转弯的车辆时，视觉信息与本体感觉和前庭信息发生冲突。由于在以往的研究中，人类的自我中心知觉是针对每一种单独的感觉而进行的，因此这些感觉之间的整合如何影响人类的定向知觉还不是很清楚。在实验1中，我们考察了视觉、本体感觉和前庭信息在单独和联合作用下对前向自我运动方向知觉的贡献。观察者乘坐小型车辆(前庭信息)或步行(本体感知信息)穿过狭窄的走廊。走廊的天花板上挂着许多垂直的栏杆。当观察者向前移动时，她/他通过摄像机和戴在头盔上的立体显示器观察到条状物体不断扩大的光流(视觉信息)。通过将观察者和/或摄像机固定在不同的角度，关于前进方向的一致或冲突的信息通过每个感应器给出。结果发现，当前向运动方向存在信息冲突时，(A)前庭信息比视觉线索占优势，(B)视觉和本体感觉信息与权重线性相加，(C)视觉信息在后退运动中占优势。在实验2中，我们考察了线性加速前进时的感觉整合。加速的方向要么向前，要么侧向，即对应于在加速或转弯的车辆中乘坐。我们开发了一种新的方法，利用三维位置传感器系统来更客观地测量自我运动的感觉。测量观察者的头部、肩部、腰部和脚踝的位置，以发现身体倾斜并伴有自我运动感。结果发现，人体向自身加速度的反方向倾斜，身体倾斜角度与加速感的主观感觉量吻合较好。身体倾斜甚至是由单纯的视觉信息引起的。这意味着视觉信息有助于自我加速和自我运动的感知。
We perceive the egocentric position and velocity of ourselves by many senses, such as vision, proprioception and vestibular sense. Normally the information by these senses is in harmony. However, there are situations in which the information is inharmonious. When we watch a wide-screen monitor or we ride in an accelerating or turning vehicle, visual information conflicts with proprioceptive and vestibular information. Since human egocentric perception has been studied for each separate sense in the previous research, it is not clear how the integration among these senses contributes to perception of human orientation. In Experiment 1, we investigated the contribution of visual, proprioceptive and vestibular information in isolation and in combination to perception of direction of forward self-motion. An observer rode in small vehicle (vestibular information) or walked (proprioceptive information) through a narrow corridor. Many vertical bars were hung from a ceiling of the corridor. When the observer moved forward, she/he viewed expanding optic flow of the bars (visual information) through video cameras and a helmet-mounted stereoscopic display. By fastening the observer and/or the cameras at different angles, consistent or conflicting information about forward direction was given through each sense. It was found that when there was conflicting information about the direction of forward motion, (a) vestibular information was more dominant than visual cue, (b) visual and proprioceptive information was linearly added with weighting, and (c) visual information was dominant for backward motion. In Experiment 2, we investigated sensory integration when we moved forward with linear acceleration. Direction of the acceleration was either forward or sideways, namely corresponding to a ride in an accelerating or turning vehicle. We developed a new method to measure sensation of self-motion more objectively by using the three-dimensional position-sensor system. Positions of observer's head, shoulder, waist and ankle were measured to find body tilt accompanied by sensation of self-motion. It was found that the body tilted towards the opposite direction of the self-acceleration and the angle of body tilt was in good agreement with the subjective amount of the accelerating sensation. The body tilt was even induced by solely visual information. This implied that visual information contributed to perception of self-acceleration as well as self-motion.