Department of Psychological Sciences, Ogden College of Science and Engineering, Western Kentucky University, 1906 College Heights Blvd. #22030, Bowling Green, KY, 42101-2030, USA.
Center for Applied Science in Health and Aging, Western Kentucky University, Bowling Green, KY, 42101-2030, USA.
Sci Rep. 2024 Nov 12;14(1):27657. doi: 10.1038/s41598-024-78860-y.
Nonrigid forms of motion are commonplace in everyday life. Given previously documented age-related deteriorations in various tasks involving motion (discriminating speed, identifying motion direction, etc.), an experiment was conducted to evaluate the potential effect of age upon the visual ability to detect rigid and nonrigid object motion. Thirty younger and older observers participated in the experiment (mean ages were 19.9 and 75.8 years, respectively). As has been done multiple times in the past, the individual motions of object vertices were manipulated to simulate either rigid motion (rotation in depth, with or without precession) or two different types of nonrigid motion (also rotation in depth with or without precession, but with added object deformation). In confirmation of previous research, there were large effects of nonrigid motion type and precession upon the ability to differentiate between rigid and nonrigid object motion. There was also a large effect of age, such that the discrimination performance of the younger observers was 49.6% higher than that exhibited by the older observers. In this first ever study of aging and nonrigid object motion perception, we thus find that aging is associated with a substantial impairment in the ability to visually perceive object nonrigidity.
日常生活中常见的运动形式是非刚性的。鉴于先前有文献记录表明，各种涉及运动的任务（如辨别速度、识别运动方向等）会随着年龄的增长而恶化，因此进行了一项实验，以评估年龄对视觉检测刚性和非刚性物体运动能力的潜在影响。30 名年轻和年长的观察者参与了实验（平均年龄分别为 19.9 岁和 75.8 岁）。过去已经多次进行过这样的操作，通过操纵物体顶点的个体运动来模拟刚性运动（深度旋转，带或不带进动）或两种不同类型的非刚性运动（同样是深度旋转，带或不带进动，但带有物体变形）。与先前的研究一致，非刚性运动类型和进动对区分刚性和非刚性物体运动的能力有很大影响。年龄也有很大影响，即年轻观察者的辨别性能比年长观察者高出 49.6%。在这项关于衰老和非刚性物体运动感知的首次研究中，我们发现衰老与视觉感知物体非刚性的能力的严重损害有关。
