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PLoS One. 2014 Feb 19;9(2):e88612. doi: 10.1371/journal.pone.0088612. eCollection 2014.

Friend or foe? Early social evaluation of human interactions.

PloS one

Marine Buon, Pierre Jacob, Sylvie Margules, Isabelle Brunet, Michel Dutat, Dominique Cabrol, Emmanuel Dupoux

Affiliations

  1. Laboratoire de Sciences Cognitives et Psycholinguistique, Ecole Des Hautes Etudes en Sciences Sociales, Département d'Etudes Cognitives-Ecole Normale Supérieure, Centre National de la Recherche Scientifique, Paris, France.
  2. Institut Jean Nicod, Ecole Des Hautes Etudes en Sciences Sociales, Département d'Etudes Cognitives-Ecole Normale Supérieure, Centre National de la Recherche Scientifique, Paris, France.
  3. Maternité Port-Royal, Faculté de Médecine Port Royal-Cochin, APHP, Université René Descartes, Paris, France.

PMID: 24586355 PMCID: PMC3929526 DOI: 10.1371/journal.pone.0088612

Abstract

We report evidence that 29-month-old toddlers and 10-month-old preverbal infants discriminate between two agents: a pro-social agent, who performs a positive (comforting) action on a human patient and a negative (harmful) action on an inanimate object, and an anti-social agent, who does the converse. The evidence shows that they prefer the former to the latter even though the agents perform the same bodily movements. Given that humans can cause physical harm to their conspecifics, we discuss this finding in light of the likely adaptive value of the ability to detect harmful human agents.

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