视觉模拟的改变重力调节对物体重量的感知

文献信息

中文摘要

背景： 重力是作用于地球上所有物体的基本力。因此，大脑已经内化了与地球重力相关的规律，这并不令人意外。重力的内部模型被认为源于前庭、视觉、本体感觉和内脏感觉线索的整合。然而，目前尚不清楚这种重力的内部表征是否有助于感知物体的物理属性。物体的重量由其质量与重力加速度的乘积决定。尽管先前的研究已经考察了物体的视觉属性（如大小、形状和质地）如何影响感知重量，但尚无研究探讨改变的视觉-重力信息的影响。方法：在这里，参与者在体验虚拟现实环境时判断物理物体的重量，在这些环境中，虚拟物体根据地球重力（地球：9.81 m s‒2）或部分地球重力（火星：3.71 m s‒2）加速。结果：与地球重力相比，参与者在观看火星重力时将物体感知为更轻。结论：我们的结果表明，参与者在感知物体重量时会纳入视觉-重力信息，并且重力的内部模型会适应视觉模拟的改变重力环境。

英文摘要

Gravity is a fundamental force acting on all objects on Earth. It is therefore unsurprising that the brain has internalized regularities associated with terrestrial gravity. An internal model of gravity is thought to arise from the integration of vestibular, visual, proprioceptive and visceral sensory cues. However, it remains unclear whether this internal representation of gravity contributes to the perception of physical object properties. Object weight is determined by the product of its mass and gravitational acceleration. Although previous studies have examined how an object's visual properties, such as its size, shape and texture, influence perceived weight, no study has investigated the effect of altered visual-gravitational information. Here, participants judged the weight of physical objects while they experienced virtual reality environments in which virtual objects accelerated according to either terrestrial gravity (Earth: 9.81 m s‒2) or partial terrestrial gravity (Mars: 3.71 m s‒2). Participants perceived the objects as lighter when viewing Mars gravity relative to Earth gravity. Our results suggest that participants incorporate visual-gravitational information when perceiving object weight, and that the internal model of gravity adapts to altered visually simulated gravitational environments.