Study reveals babies can tell who has close relationships based on saliva
In a new study, researchers have shown that babies expected people who share saliva, to come to one another's aid when one person is in distress.
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In a new study, researchers have shown that babies expected people who share saliva, to come to one another's aid when one person is in distress.
MIT neuroscientists have identified a specific signal that young children and even babies can use to determine whether two people have a strong relationship and a mutual obligation to help each other: whether those two people kiss, share food, or have other interactions that involve sharing saliva.
Learning to navigate social relationships is a skill that is critical for surviving in human societies. For babies and young children, that means
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