Department of Psychology, Graduate School of Letters, Kyoto University, Japan.
J Vis. 2024 Jul 2;24(7):12. doi: 10.1167/jov.24.7.12.
Perceiving verticality is crucial for accurate spatial orientation. Previous research has revealed that tilted scenes can bias verticality perception. Verticality perception bias can be represented as the sum of multiple periodic functions that play a role in the perception of visual orientation, where the specific factors affecting each periodicity remain uncertain. This study investigated the influence of the width and depth of an indoor scene on each periodic component of the bias. The participants were presented with an indoor scene showing a rectangular checkerboard room (Experiment 1), a rectangular aperture on the wall (Experiment 2), or a rectangular dotted room (Experiment 3), with various aspect ratios. The stimuli were presented with roll orientations ranging from 90° clockwise to 90° counterclockwise. The participants were asked to report their subjective visual vertical (SVV) perceptions. The contributions of 45°, 90°, and 180° periodicities to the SVV error were assessed by the weighted vector sum model. In Experiment 1, the periodic components of the SVV error increased with the aspect ratio. In Experiments 2 and 3, only the 90° component increased with the aspect ratio. These findings suggest that extended transverse surfaces may modulate the periodic components of verticality perception.
感知垂直方向对于准确的空间定位至关重要。先前的研究表明，倾斜的场景会影响垂直方向的感知。垂直方向感知的偏差可以表示为多个周期函数的总和，这些函数在视觉方向的感知中起作用，而影响每个周期性的具体因素尚不确定。本研究探讨了室内场景的宽度和深度对偏差的每个周期性分量的影响。参与者被呈现出一个室内场景，其中显示一个矩形棋盘房间（实验 1）、墙上的一个矩形孔（实验 2）或一个矩形点状房间（实验 3），具有不同的纵横比。刺激的滚动方向从顺时针 90°到逆时针 90°变化。参与者被要求报告他们的主观视觉垂直（SVV）感知。通过加权向量和模型评估 45°、90°和 180°周期性对 SVV 误差的贡献。在实验 1 中，SVV 误差的周期性分量随纵横比的增加而增加。在实验 2 和 3 中，只有 90°分量随纵横比的增加而增加。这些发现表明，扩展的横向表面可能会调节垂直方向感知的周期性分量。
