Caregivers typically use an exaggerated speech register known as infant‐directed speech (IDS) in communication with infants. Infants prefer IDS over adult‐directed speech (ADS) and IDS is functionally relevant in infant‐directed communication. We examined interactions among maternal IDS quality, infants’ preference for IDS over ADS, and the functional relevance of IDS at 6 and 13 months. While 6‐month‐olds showed a preference for IDS over ADS, 13‐month‐olds did not. Differences in gaze following behavior triggered by speech register (IDS vs. ADS) were found in both age groups. The degree of infants’ preference for IDS (relative to ADS) was linked to the quality of maternal IDS infants were exposed to. No such relationship was found between gaze following behavior and maternal IDS quality and infants’ IDS preference. The results speak to a dynamic interaction between infants’ preference for different kinds of social signals and the social cues available to them.

中文翻译：

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母亲的输入和婴儿对婴儿定向言语的反应。

护理人员通常会使用一种被称为婴儿定向语音 (IDS) 的夸大语音语域与婴儿进行交流。与成人定向语音 (ADS) 相比，婴儿更喜欢 IDS，并且 IDS 在婴儿定向交流中具有功能相关性。我们检查了母亲 IDS 质量、婴儿对 IDS 而非 ADS 的偏好以及 IDS 在 6 个月和 13 个月时的功能相关性之间的相互作用。虽然 6 个月大的孩子表现出对 IDS 的偏好而不是 ADS，但 13 个月大的孩子没有。在两个年龄组中都发现了由语音记录触发的凝视行为（IDS 与 ADS）的差异。婴儿对 IDS 的偏好程度（相对于 ADS）与母亲 IDS 婴儿接触的质量有关。在注视跟随行为与母亲IDS质量和婴儿IDS偏好之间没有发现这种关系。