The role of visual information on the perceptual system of heaviness and force generating system of lifting

本研究的目的是（1）建立虚拟现实环境，在该虚拟现实环境中，诸如物体大小、颜色、纹理和形状的视觉信息被容易地和准确地操纵，而不依赖于其他物理和触觉信息，诸如物体重量、表面光滑度、惯性张量、重心和质量分布，这些物理和触觉信息比视觉信息更强烈地影响人类的感知和运动，（2）探讨视觉信息，特别是物体大小，对被试的重知觉系统和举物运动的力产生系统的影响。关于第一个目的，在大坂大学研究生院多媒体工程系的Yoshifumi Kitamura博士和克莉丝汀L博士的合作下，在Tezukayama大学的行为神经科学实验室建立了被称为“虚拟对象实验室系统”的虚拟环境。西蒙弗雷泽大学运动学院 关于我们 ，加上一些有用的设备。但由于超声波位置传感器的分辨率不高，在实验操作中也遇到了一些困难，需要进行改进。相反，关于第二个目的，视觉尺寸对感知系统的沉重感的影响进行了研究，使用虚拟手实验室系统下的尺寸-重量错觉范式（Charpentier 1891）。17名受试者在虚拟手实验室系统下比较两个相同重量但不同视觉尺寸的增强立方体的重量差异。结果表明，视觉尺寸信息系统地影响知觉系统。也就是说，随着物体大小线索的增加，被举起的物体被感知为更轻。随诊结果显示，错觉的发生与被试辨别体重的敏感性显著相关，而与辨别视觉尺寸的敏感性不相关。总之，视觉大小线索引起的大小-重量错觉是基于感官的，并取决于个人的综合感知的基础上多通道的感觉信息。少

The purpose of this study was (1) to establish the virtual-reality environment in which visual information such as object size, color, texture, and shape were easily and accurately manipulated independent of other physical and haptic information such as object weight, surface slipperiness, inertia tensor, center of gravity, and mass distribution which affects human perception and movement more strongly than visual information, and (2) to investigate the roles of visual information, such as object size especially in this study, on the perceptual system of heaviness and force generating system of lifting movement. With regard to the first purpose, the virtual-environment called “Virtual Object Lab System" has been established at The Laboratory of Behavioral Neuroscience in Tezukayama University, in collaboration of Dr. Yoshifumi Kitamura, Department of Multimedia Engineering of Graduate School of Osaka University, and Dr. Christine L. MacKenzie, School of Kinesiology of Simon Fraser Univ … More ersity, with addition of some useful devices. However, some difficulties also have been found in operating for the experiment due to its poor resolution of position sensing by ultrasonic waves, thus the improvement has been required. Instead, with regard to the second purpose, effects of visual size on perceiving system of heaviness were investigated using the size-weight illusion paradigm (Charpentier 1891) under the Virtual Hand Lab System. 17 subjects compared difference in heaviness of two augmented cubes with identical weight but different visual sizes under the Virtual Hand Lab System. Results indicated that visual size information was systematically affected perceived system. That is, the lifted object was perceived to be lighter as object size cues increased. Follow-up tests showed occurrence of the illusive perception was significantly correlated with subject's sensitivity to discriminate WEIGHT, but not with sensitivity to discriminate VISUAL SIZE. Conclusively, the size-weight illusion induced by visual size cues is sensory based, and depends on an individual's integrated perception based on multimodal sensory information. Less