Ever wondered how many of our everyday laughs, groans and sighs are instinctive rather than learned from our peers? It now seems that only expressions of laughter and relief are instinctive, whereas other emotional outbursts need to be learned from other people. To find out which sounds are instinctive, a team led by Disa Sauter of the Max Planck Institute for Psycholinguistics in Nijmegen, the Netherlands, asked eight deaf and eight hearing individuals to vocalise nine different emotions, but without words. These included fear, relief, anger, hilarity, triumph, disgust and sadness.
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