Spatial scale contribution to early visual differences between face and object processing
Spatial scale contribution to early visual differences between face and object processing
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DOI：
10.1016/s0926-6410(03)00056-9
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发表时间：
2003-05-01
期刊：
影响因子：
--
通讯作者：
Rossion, B
中科院分区：
文献类型：
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作者：
Goffaux, V;Gauthier, I;Rossion, B
事件相关电位（ERP）研究强调了一种枕-颞电位，即N170，它对面部的刺激大于其他类别的刺激，并因面部的刺激反转而延迟，但对其他物体则不然。我们研究了高通和低通滤波是如何调节面部和物体处理之间的早期差异的。16张人脸和汽车的灰度图像被过滤，只保留相对较低（LSF）或较高（HSF）的空间频率，并直立或倒置。受试者报告了在宽通和过滤条件下面部和汽车的方向。在宽通条件下，我们复制了典型的N170面特定的振幅和延迟反转的影响。这些效应也存在于LSF条件中。然而，HSF条件揭示了一个完全不同的模式：（1）与面孔相比，汽车的N170振幅相似;（2）面孔倒置时N170潜伏期延迟不存在。这些结果表明，人脸和物体之间的早期处理差异的来源是有关的提取信息主要包含在LSF，传达粗糙的配置线索，特别是突出的人脸处理。(C)2003 Elsevier Science B. V.保留所有权利。
Event-related potential (ERP) studies have highlighted an occipito-temporal potential, the N170, which is larger for faces than for other categories and delayed by stimulus inversion of faces, but not of other objects. We examined how high-pass and low-pass filtering modulate such early differences between the processing of faces and objects. Sixteen grey-scale pictures of faces and cars were filtered to preserve only relatively low (LSF) or high (HSF) spatial frequencies and were presented upright or upside-down. Subjects reported the orientation of the faces and cars in broad-pass and filtered conditions. In the broad-pass condition, we replicated typical N170 face-specific effects of amplitude and delay with inversion. These effects were also present in the LSF condition. However, a completely different pattern was revealed by the HSF condition: (1) a similar N170 amplitude for cars as compared to faces and (2) an absence of N170 latency delay with face inversion. These results show that the source of early processing differences between faces and objects is related to the extraction of information contained mostly in the LSF, which conveys coarse configuration cues particularly salient for face processing. (C) 2003 Elsevier Science B.V. All rights reserved.