Golomb Julie D, L'heureux Zara E, Kanwisher Nancy
1Department of Psychology, The Ohio State University.
Psychol Sci. 2014 May 1;25(5):1067-78. doi: 10.1177/0956797614522068. Epub 2014 Mar 19.
When people move their eyes, the eye-centered (retinotopic) locations of objects must be updated to maintain world-centered (spatiotopic) stability. Here, we demonstrated that the attentional-updating process temporarily distorts the fundamental ability to bind object locations with their features. Subjects were simultaneously presented with four colors after a saccade-one in a precued spatiotopic target location-and were instructed to report the target's color using a color wheel. Subjects' reports were systematically shifted in color space toward the color of the distractor in the retinotopic location of the cue. Probabilistic modeling exposed both crude swapping errors and subtler feature mixing (as if the retinotopic color had blended into the spatiotopic percept). Additional experiments conducted without saccades revealed that the two types of errors stemmed from different attentional mechanisms (attention shifting vs. splitting). Feature mixing not only reflects a new perceptual phenomenon, but also provides novel insight into how attention is remapped across saccades.
当人们移动眼睛时，物体以眼睛为中心（视网膜拓扑）的位置必须更新，以保持以世界为中心（空间拓扑）的稳定性。在此，我们证明了注意力更新过程会暂时扭曲将物体位置与其特征绑定的基本能力。在扫视后，向受试者同时呈现四种颜色——其中一种在预先提示的空间拓扑目标位置——并指示他们使用色轮报告目标的颜色。受试者的报告在颜色空间中系统地朝着提示的视网膜拓扑位置中干扰物的颜色偏移。概率模型揭示了粗略的交换错误和更细微的特征混合（就好像视网膜拓扑颜色融入了空间拓扑感知中）。在没有扫视的情况下进行的额外实验表明，这两种错误源于不同的注意力机制（注意力转移与注意力分散）。特征混合不仅反映了一种新的感知现象，还为扫视过程中注意力如何重新映射提供了新的见解。
