Previous research has shown that eye gaze patterns relate to language development, with more attention to the mouth signaling ongoing acquisition. We examined infants’ eye gaze in a stress perception experiment, in which European Portuguese (EP) learning infants showed a preference for the iambic stress pattern. Specifically, we asked whether there was a relation between eye gaze patterns and the preferred stress pattern. Eye gaze patterns of 25 monolingual typically developing infants aged 5–6 months old were examined using eye-tracking. Our results show that, although an interaction between looks to the area of interest (face, eyes, mouth, and arm) and stress preference was not found, eye gaze to the mouth region (and to the face) was modulated by the stress pattern, with more attention to the mouth in infants that do not show an iambic preference. These findings add further support for infants’ use of eye gaze in early language development. They also highlight the need for multimodal approaches for a better understanding of language development. In the particular case of the challenging topic of the acquisition of stress in European Portuguese, they provide converging evidence for an advantage of iambic stress in early development. (195 words).

中文翻译：

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眼睛还是嘴巴？在欧洲葡萄牙语中探索眼睛注视模式及其与早期压力感知的关系

先前的研究表明，注视模式与语言发展有关，更多地关注嘴巴表示正在进行的习得。我们在压力感知实验中检查了婴儿的视线，在该实验中，欧洲葡萄牙语（EP）学习婴儿对偏向压力模式表现出偏爱。具体来说，我们问眼睛注视模式和偏好压力模式之间是否存在关系。使用眼动追踪技术检查了25个5-6个月大的单语种典型发育中的婴儿的眼睛注视模式。我们的结果表明，虽然没有发现关注区域（脸，眼睛，嘴巴和手臂）的外貌与压力偏好之间的交互作用，但眼睛对注视嘴巴区域（和脸部）的凝视却受压力模式的调节，对没有表现出偏爱的婴儿的嘴巴给予更多关注。这些发现为婴儿在早期语言发展中使用视线注视提供了进一步的支持。他们还强调了需要采用多模式方法来更好地理解语言发展。在欧洲葡萄牙语中关于获取压力这一具有挑战性的主题的特定案例中，它们提供了越来越多的证据，证明了早期开发中压力大的优势。（195个字）。他们提供了越来越多的证据，证明了早期发展中压力大的优势。（195个字）。他们提供了越来越多的证据，证明了早期发展中压力大的优势。（195个字）。