Despite being inherently dynamic phenomena, much of our understanding of how infants attend and scan facial expressions is based on static face stimuli. Here we investigate how six-, nine-, and twelve-month infants allocate their visual attention toward dynamic-interactive videos of the six basic emotional expressions, and compare their responses with static images of the same stimuli. We find infants show clear differences in how they attend and scan dynamic and static expressions, looking longer toward the dynamic-face and lower-face regions. Infants across all age groups show differential interest in expressions, and show precise scanning of regions “diagnostic” for emotion recognition. These data also indicate that infants' attention toward dynamic expressions develops over the first year of life, including relative increases in interest and scanning precision toward some negative facial expressions (e.g., anger, fear, and disgust).

中文翻译：

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婴儿对静态和动态面部表情的扫描方式不同

尽管本质上是动态现象，但我们对婴儿如何参与和扫描面部表情的大部分理解都是基于静态面部刺激。在这里，我们调查了 6 个月、9 个月和 12 个月大的婴儿如何将他们的视觉注意力分配到六种基本情绪表达的动态交互式视频上，并将他们的反应与相同刺激的静态图像进行比较。我们发现婴儿在关注和扫描动态和静态表情的方式上表现出明显的差异，更长时间地看向动态面部和下面部区域。各个年龄段的婴儿对表情表现出不同的兴趣，并表现出对情绪识别“诊断”区域的精确扫描。这些数据还表明婴儿对动态表达的注意力在生命的第一年发展起来，