Lateral biases in assumptions of lighting position
Lateral biases in assumptions of lighting position
复制标题
照明位置假设的横向偏差
DOI：
10.1016/j.bandc.2004.08.021
复制
发表时间：
2005
影响因子：
2.5
通讯作者：
Brent M Robinson
中科院分区：
文献类型：
--
作者：
L. Elias;Brent M Robinson
人们认为图片中的光源来自上方，有证据表明这种现象也表明了横向偏差。当研究人员呈现多个模糊的刺激或视觉上复杂的物体时，人们会假设光源来自上方和左侧。然而，当单一的相对简单的刺激，这种横向偏见是不容易观察到的。为了研究横向偏差是否依赖于所呈现的刺激的数量，本实验采用了被试内设计，呈现单个球体或成对球体。与我们的预期相反，在单球条件和双球条件下都表现出了双偏性。从左侧照亮的单个球体比从右侧照亮的类似球体更有可能被判断为凸形。类似地，当呈现成对的侧向照明的球体并且要求参与者判断哪个球体看起来更凸时，参与者选择从左侧照明的球体，而不管照明的角度如何。总的来说，这些结果表明，有横向偏差的假设照明位置，这些偏差不依赖于在任何给定的时间被感知的刺激的数量。
People presume that the light source in pictures comes from above, and there is some evidence that this phenomenon also demonstrates lateral biases. When investigators present multiple ambiguous stimuli or visually complex objects, people assume that the source of light is from above, and to the left. However, when single relatively simple stimuli are presented, this lateral bias is not readily observed. To investigate whether lateral bias is dependent on the number of stimuli presented, the present experiment employs a within-subjects design to present single spheres or pairs of spheres. Contrary to our expectations, leftward biases were exhibited in both the single-sphere condition and the paired-spheres condition. Single spheres that were lit from the left were more likely to be judged as convex than comparable spheres lit from the right. Similarly, when pairs of laterally lit spheres were presented and participants were asked to judge which sphere appeared to be more convex, participants chose spheres lit from the left regardless of the angle of illumination. Collectively, these results suggest that there are lateral biases in assumptions of illumination position and that these biases do not depend on the number of stimuli being perceived at any given time.