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

这项研究的目的是(1)建立一个虚拟现实环境，在这个环境中，物体的大小、颜色、纹理和形状等视觉信息可以轻松而准确地操纵，而不依赖于其他物理和触觉信息，如物体的重量、表面滑度、惯性张量、重心和质量分布，这些信息对人类的感知和运动的影响比视觉信息更大；(2)研究视觉信息，如物体的大小，特别是本研究中的物体大小，对举起运动的重量感知系统和力产生系统的作用。关于第一个目的，在大阪大学研究生院多媒体工程系北村洋文博士和西蒙·弗雷泽大学运动学研究所…克里斯汀·L·麦肯齐博士的合作下，在Tezukayama大学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更强大，增加了一些有用的设备。但由于超声波位置传感分辨率较低，在实验操作中也存在一定的困难，有待改进。相反，对于第二个目的，在虚拟手实验系统下，使用大小-重量错觉范式(Charpentier 1891)考察了视觉大小对重物知觉系统的影响。17名受试者在虚拟手实验室系统中比较了两个重量相同但视觉大小不同的扩大立方体的重量差异。结果表明，视觉大小信息对知觉系统有系统的影响。也就是说，随着物体大小线索的增加，被抬起的物体被感觉到更轻。后续测试表明，错觉的发生与受试者辨别体重的敏感度显著相关，但与辨别视觉大小的敏感度无关。综上所述，视觉尺寸线索诱发的尺寸-体重错觉是基于感觉的，依赖于个体基于多通道感觉信息的综合知觉。较少

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