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Relation between gravitational and arm-movement direction in the mechanism of perception in bimanual steering

机译：双手转向知觉机制中重力与手臂运动方向的关系

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摘要

This paper presents the effects of the opposing directions of gravity relative to right- and left-arm movement in bimanual steering. We developed a simulated steering system that permits independent left- and right-hand steering and torque presentations on a single axis, and independent measurements of the steering force exerted by each hand. In a steering force measurement experiment, left and right system units were mechanically combined to function as a single steering unit. Measurements of the force exerted by the participants with their left and right hands revealed that in human bimanual steering, the arm moving with gravity exerts a larger steering force than the one moving against gravity. In a steering force discrimination experiment, the system was mechanically configured to provide independence in both the function of the left and right steering units and the presentation of different left- and right-side steering torques. Each participant was then asked whether the steering force was felt to be larger on the left or the right during bimanual steering. The results of this experiment showed no difference between the left and the right arm in the discrimination threshold, but did reveal a perceptual bias in which the forces exerted in arm movements with gravity were perceived as being smaller than the forces exerted against gravity. Furthermore, there was no significant difference between the measured force and the force that would be predicted from the obtained perceptual bias.
机译：本文介绍了双向转向中重力相对方向相对于左右臂运动的影响。我们开发了一种模拟转向系统，该系统允许在单个轴上显示独立的左右手转向和扭矩，并独立测量每只手施加的转向力。在转向力测量实验中，左，右系统单元在机械上进行了组合，以充当单个转向单元。对参与者用左手和右手施加的力的测量结果表明，在人类的双手转向中，与重力相反的方向运动的手臂所施加的转向力要大于与重力相反的方向。在转向力识别实验中，系统在机械上进行了配置，以提供左右转向单元功能以及左右两侧转向扭矩的表示形式方面的独立性。然后，向每个参与者询问在双向转向过程中感觉转向力在左侧还是右侧。该实验的结果表明左右臂在判别阈值上没有差异，但是确实揭示了一种感知偏差，其中感觉到在重力作用下手臂运动所产生的力小于在重力作用下所产生的力。此外，测得的力与根据所获得的感知偏差可预测的力之间没有显着差异。

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