Department of Physiology, College of Medicine & Medical Sciences, Arabian Gulf University, Manama, Bahrain.
Faculty of Health and Social Sciences, Bournemouth University, Poole, UK.
Appl Neuropsychol Adult. 2024 Jul-Aug;31(4):405-411. doi: 10.1080/23279095.2022.2030741. Epub 2022 Feb 9.
There is an overall left visual field/right hemisphere advantage in young adults for masked, tachistoscopically presented images on the Rod-and-Frame Test (RFT). This study explored potential age-related lateralization differences in processing of visual context on the RFT.
The 35 young and 33 older adults aligned a rod surrounded either by no frame, a vertical, or leftward/rightward tilted frame to their perceived vertical. Algebraic errors of rod alignment were used to derive the rod-and-frame effect (RFE) and asymmetry index.
Young adults had frequent indirect effects, mostly to the right-tilted frame, while older adults hardly produced any. Compared with nontilted frames, young adults displayed larger alignment errors with left-tilted frames; however, older adults exhibited this same effect for both frame tilt conditions. Young adults had smaller RFE values than older adults for the right-tilted frame, with no age-related difference in RFE for the left-tilted frame or asymmetry index. The negative asymmetry index was statistically different from the true vertical only in young adults.
There is an age-related reduction in the right hemisphere processing of left-sided visual contexts on the RFT. Such findings can assist clinicians to improve interpretation of RFT findings in clinical patients.
在年轻成年人中，对于在 Rod-and-Frame Test（RFT）上以掩蔽、速示方式呈现的图像，整体上存在左视野/右半球优势。本研究探讨了在 RFT 上处理视觉背景时潜在的与年龄相关的侧化差异。
35 名年轻成年人和 33 名年长成年人将一根杆与他们感知的垂直方向对齐，该杆周围没有框架、垂直框架或向左/向右倾斜的框架。使用杆对齐的代数误差来推导杆和框架效应（RFE）和不对称指数。
年轻成年人经常出现间接影响，主要是向右倾斜的框架，而年长成年人几乎没有产生任何影响。与非倾斜框架相比，年轻成年人在左倾斜框架下表现出更大的对齐误差；然而，年长成年人在两种框架倾斜条件下都表现出相同的效果。对于右倾斜框架，年轻成年人的 RFE 值小于年长成年人，而对于左倾斜框架或不对称指数，年龄没有相关性差异。负的不对称指数仅在年轻成年人中与真实垂直有统计学差异。
在 RFT 上，对左侧视觉背景的右半球处理存在与年龄相关的减少。这些发现可以帮助临床医生改善对 RFT 结果在临床患者中的解释。
