The robustness of eye-mouth index as an eye-tracking metric of social attention in toddlers.
The robustness of eye-mouth index as an eye-tracking metric of social attention in toddlers.
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DOI：
10.1177/0165025419885186
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发表时间：
2020-09-01
影响因子：
3.7
通讯作者：
Luyster RJ
中科院分区：
文献类型：
--
作者：
Souter NE;Arunachalam S;Luyster RJ
关于婴儿和幼儿社会注意力的眼动追踪研究包括异质刺激和分析技术。这允许在不同条件下测量内部面部特征，但限制了跨研究比较。眼口指数 (EMI) 是对看眼睛或看嘴的相对偏好的衡量标准，与关注面部的时间无关。当前的研究评估了 EMI 对刺激类型差异的影响是否比对眼睛、嘴巴和面部的停留时间百分比 (PDT) 更强大。参与者通常是 18 至 30 个月大的幼儿 (N = 58)。刺激是单个和多个演员的动态视频。假设刺激类型会影响面部、眼睛和嘴巴的 PDT，但不会影响 EMI。广义估计方程表明，包括 EMI 在内的所有测量值均受到刺激类型的影响。然而，计划的对比表明，在比较异质刺激时，EMI 比 PDT 更稳健。 EMI 可以在眼球追踪研究中对社会关注度对内部面部特征进行更强有力的比较。
Eye-tracking research on social attention in infants and toddlers has included heterogeneous stimuli and analysis techniques. This allows measurement of looking to inner facial features under diverse conditions but restricts across-study comparisons. Eye-mouth index (EMI) is a measure of relative preference for looking to the eyes or mouth, independent of time spent attending to the face. The current study assessed whether EMI was more robust to differences in stimulus type than percent dwell time (PDT) toward the eyes, mouth, and face. Participants were typically developing toddlers aged 18 to 30 months (N = 58). Stimuli were dynamic videos with single and multiple actors. It was hypothesized that stimulus type would affect PDT to the face, eyes, and mouth, but not EMI. Generalized estimating equations demonstrated that all measures including EMI were influenced by stimulus type. Nevertheless, planned contrasts suggested that EMI was more robust than PDT when comparing heterogeneous stimuli. EMI may allow for a more robust comparison of social attention to inner facial features across eye-tracking studies.
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