Finding faces, animals, and vehicles in far peripheral vision.
Finding faces, animals, and vehicles in far peripheral vision.
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DOI：
10.1167/16.2.10
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发表时间：
2016-01-01
影响因子：
1.8
通讯作者：
Thorpe, Simon J
中科院分区：
文献类型：
--
作者：
Boucart, Muriel;Lenoble, Quentin;Thorpe, Simon J
神经影像学研究表明，与建筑物和场景相比，面部表现出中央视野偏差。在扫视选择任务中，Crouzet，Kirchner和Thorpe（2010）证明了在距离注视点8°的刺激下检测面部的速度优势。我们使用相同的范式来检查相对于其他类别（动物和车辆）的面部优势是否延伸到整个视野（从10°到80°偏心），或者是否仅限于中央视野。自然景物的成对照片（目标和干扰物）在全景屏幕上同时显示在中心注视点的左侧和右侧1s。参与者被要求扫视目标刺激（面部，动物或车辆）。干扰物是对应于另外两个类别的图像。用头戴式眼动仪记录眼动。仅测量了第一次扫视。实验1表明，（a）在分类速度方面，面孔保持其优势，动物和车辆在整个视野，高达80°和（B）即使在拥挤的条件下（嵌入在场景中的物体），性能高于机会的三类刺激在80°偏心。实验2表明，当与另一个具有高度类内结构相似性的类别（汽车）相比时，面孔在所有偏心率上都保持了优势。这些结果表明，面孔的偏见不仅限于中央视野，至少在分类任务。
Neuroimaging studies have shown that faces exhibit a central visual field bias, as compared to buildings and scenes. With a saccadic choice task, Crouzet, Kirchner, and Thorpe (2010) demonstrated a speed advantage for the detection of faces with stimuli located 8° from fixation. We used the same paradigm to examine whether the face advantage, relative to other categories (animals and vehicles), extends across the whole visual field (from 10° to 80° eccentricity) or whether it is limited to the central visual field. Pairs of photographs of natural scenes (a target and a distractor) were displayed simultaneously left and right of central fixation for 1s on a panoramic screen. Participants were asked to saccade to a target stimulus (faces, animals, or vehicles). The distractors were images corresponding to the two other categories. Eye movements were recorded with a head-mounted eye tracker. Only the first saccade was measured. Experiment 1 showed that (a) in terms of speed of categorization, faces maintain their advantage over animals and vehicles across the whole visual field, up to 80° and (b) even in crowded conditions (an object embedded in a scene), performance was above chance for the three categories of stimuli at 80° eccentricity. Experiment 2 showed that, when compared to another category with a high degree of within category structural similarity (cars), faces keep their advantage at all eccentricities. These results suggest that the bias for faces is not limited to the central visual field, at least in a categorization task.