How face perception unfolds over time
How face perception unfolds over time
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DOI：
10.1038/s41467-019-09239-1
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发表时间：
2019-03-19
影响因子：
16.6
通讯作者：
Kanwisher, Nancy
中科院分区：
文献类型：
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作者：
Dobs, Katharina;Isik, Leyla;Kanwisher, Nancy
在观看一张脸的几分之一秒内，我们就已经确定了它的性别、年龄和身份。要充分理解这一非凡的壮举，需要对它所需的计算步骤以及在每个步骤中提取的表示进行描述。在这里，我们使用脑磁图(MEG)来测量神经对面孔反应的时间进程，从而解决关于面孔处理如何随着时间的推移而展开的两个基本问题。首先，使用表征相似性分析，我们发现面部性别和年龄信息出现在身份信息之前，这表明面部尺寸的加工是从粗到精的。其次，熟悉面孔的认同感和性别表征在很早就得到了增强，这表明熟悉面孔的行为优势来自于早期前馈加工机制的调整。这些发现开始揭示人类面孔加工的时间进程，并为面孔感知的计算理论提供了强有力的新约束。
Within a fraction of a second of viewing a face, we have already determined its gender, age and identity. A full understanding of this remarkable feat will require a characterization of the computational steps it entails, along with the representations extracted at each. Here, we used magnetoencephalography (MEG) to measure the time course of neural responses to faces, thereby addressing two fundamental questions about how face processing unfolds over time. First, using representational similarity analysis, we found that facial gender and age information emerged before identity information, suggesting a coarse-to-fine processing of face dimensions. Second, identity and gender representations of familiar faces were enhanced very early on, suggesting that the behavioral benefit for familiar faces results from tuning of early feed-forward processing mechanisms. These findings start to reveal the time course of face processing in humans, and provide powerful new constraints on computational theories of face perception.