During infancy, intersensory facilitation declines gradually as unisensory perception develops. However, this trade‐off was mainly investigated using audiovisual stimulations. Here, fifty 4‐ to 12‐month‐old infants (26 females, predominately White) were tested in 2017–2020 to determine whether the facilitating effect of their mother's body odor on neural face categorization, as previously observed at 4 months, decreases with age. In a baseline odor context, the results revealed a face‐selective electroencephalographic response that increases and changes qualitatively between 4 and 12 months, marking improved face categorization. At the same time, the benefit of adding maternal odor fades with age (R2 = .31), indicating an inverse relation with the amplitude of the visual response, and generalizing to olfactory‐visual interactions previous evidence from the audiovisual domain.

中文翻译：

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婴儿大脑的嗅觉到视觉的便利性从 4 个月到 12 个月逐渐下降


在婴儿期，随着单感觉知觉的发展，感觉间促进逐渐下降。然而，这种权衡主要是使用视听刺激来研究的。在这里，我们在 2017 年至 2020 年对 50 名 4 至 12 个月大的婴儿（26 名女性，主要是白人）进行了测试，以确定母亲的体味对神经面部分类的促进作用（正如之前在 4 个月时观察到的那样）是否会随着年龄的增长而减弱。年龄。在基线气味背景下，结果显示面部选择性脑电图反应在 4 至 12 个月之间增加并发生质的变化，标志着面部分类的改进。同时，添加母体气味的好处会随着年龄的增长而消失（右2 = .31），表明与视觉响应幅度呈反比关系，并将先前来自视听领域的证据推广到嗅觉-视觉相互作用。