Eight-month-old infants' behavioral responses to peers' emotions as related to the asymmetric frontal cortex activity.
Eight-month-old infants' behavioral responses to peers' emotions as related to the asymmetric frontal cortex activity.
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DOI：
10.1038/s41598-018-35219-4
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发表时间：
2018-11-21
影响因子：
4.6
通讯作者：
Geangu E
中科院分区：
文献类型：
--
作者：
Crespo-Llado MM;Vanderwert R;Roberti E;Geangu E
幼儿对同伴的痛苦很敏感，并在情感上与同伴的痛苦趋同。目前还不清楚这些反应是否延伸到积极的影响，以及观察同伴的情绪是否会激发婴儿的行为。本研究探讨了8个月龄婴儿在同伴哭和笑时的不对称额叶脑电，及其与接近和退缩行为的关系。参与者在两个单独的会议期间观察婴儿哭泣或大笑的视频。在第一个阶段记录了额叶脑电图的α功率，而在第二个阶段记录了婴儿的行为和情感表达。情感的面部和声音表达表明，婴儿在情感上与同龄人的痛苦一致，在一定程度上，与他们的快乐一致。在群体水平上，哭泣的同伴引起右侧额叶活动。然而，在这种情况下，那些右额叶活动减少而左额叶活动增加的婴儿更有可能接近他们的同伴。总的来说，8个月大的婴儿没有表现出不对称的额叶活动，以回应同伴的笑声。但是，那些倾向于长时间注视快乐同伴的婴儿更有可能以左侧额叶活动做出反应。左额叶活动的变化和简单的接近行为之间的联系表明，婴儿对苦恼同伴的反应存在动机维度。
Infants are sensitive to and converge emotionally with peers’ distress. It is unclear whether these responses extend to positive affect and whether observing peer emotions motivates infants’ behaviors. This study investigates 8-month-olds’ asymmetric frontal EEG during peers’ cry and laughter, and its relation to approach and withdrawal behaviors. Participants observed videos of infant crying or laughing during two separate sessions. Frontal EEG alpha power was recorded during the first, while infants’ behaviors and emotional expressions were recorded during the second session. Facial and vocal expressions of affect suggest that infants converge emotionally with their peers’ distress, and, to a certain extent, with their happiness. At group level, the crying peer elicited right lateralized frontal activity. However, those infants with reduced right and increased left frontal activity in this situation, were more likely to approach their peer. Overall, 8-month-olds did not show asymmetric frontal activity in response to peer laughter. But, those infants who tended to look longer at their happy peer were more likely to respond with left lateralized frontal activity. The link between variations in left frontal activity and simple approach behaviors indicates the presence of a motivational dimension to infants’ responses to distressed peers.
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