Illinois State University, USA.
Clemson University, USA.
Perception. 2023 Jul;52(7):484-501. doi: 10.1177/03010066231175599. Epub 2023 May 25.
We performed four experiments to investigate whether people can perceive the length of a target object (a "fish") that is attached to a freely wielded object (the "fishing pole") by a length of string, and if so, whether this ability is grounded in the sensitivity of the touch system to invariant mechanical parameters that describe the forces and torques required to move the target object. In particular, we investigated sensitivity to mass, static moment, and rotational inertia-the forces required to keep an object from falling due to gravity, the torque required to keep an object from rotating due to gravity, and the torques required to actively rotate an object in different directions, respectively. We manipulated the length of the target object (Experiment 1), the mass of the target object (Experiment 2), and the mass distribution of the target object (Experiments 3 and 4). Overall, the results of the four experiments showed that participants can perform this task. Moreover, when the task is configured such that it more closely approximates a wielding at a distance task, the ability to do so is grounded in sensitivity to such forces and torques.
我们进行了四项实验，旨在探究人们是否能够感知到通过一根绳子与可自由挥舞的物体（“鱼竿”）相连的目标物体（“鱼”）的长度，如果能，这种能力是否基于触觉系统对描述移动目标物体所需的力和扭矩的不变机械参数的敏感性。具体而言，我们研究了对质量、静力矩和转动惯量的敏感性——分别是使物体因重力而不坠落所需的力、使物体因重力而不旋转所需的扭矩，以及使物体以不同方向主动旋转所需的扭矩。我们操纵了目标物体的长度（实验 1）、目标物体的质量（实验 2）和目标物体的质量分布（实验 3 和实验 4）。总的来说，四项实验的结果表明，参与者能够完成这项任务。此外，当任务的配置更接近远距离挥舞任务时，这种能力是基于对这些力和扭矩的敏感性。
