Comparing adaptation of constrained and unconstrained movements in three dimensions

C. Scharver, J. Patton, R. Kenyon, E. Kersten
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引用次数: 5

Abstract

This paper describes targeted reaching experiments conducted using a new augmented reality system. Combining a large-workspace immersive virtual environment with physical force feedback, the system distorted subjects' movements using a viscous curl force field. Following previous experiments using a different robot, half the subjects were constrained to horizontal, planar movements. The remaining subjects performed unconstrained movements throughout the 3D workspace. Examining after-effects as an indication of learning, we found that constrained subjects learned the force field. However, it was difficult to detect whether the unconstrained subjects learned forces of identical magnitude. Our results found that force fields strengths eliciting constrained 2D adaptation have difficulty exhibiting after-effects for unconstrained 3D movements. The increased motor variability for 3D reaching movements requires consideration for future experimental design.
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在三维空间中比较受约束和无约束运动的适应性
本文描述了使用一种新的增强现实系统进行的有针对性的接触实验。该系统将大型工作空间沉浸式虚拟环境与物理力反馈相结合,利用粘性旋度力场扭曲受试者的运动。根据之前使用不同机器人的实验,一半的受试者被限制在水平、平面运动。其余的受试者在整个3D工作空间中进行不受约束的运动。通过检验作为学习指示的后效,我们发现受约束的受试者学习了力场。然而,很难检测到不受约束的受试者是否学会了相同大小的力。我们的研究结果发现,引发受限2D自适应的力场强度难以表现出无约束3D运动的后效应。增加的运动可变性3D到达运动需要考虑未来的实验设计。
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