Familiar and unfamiliar face recognition in crested macaques (Macaca nigra)

Many species use facial features to identify conspecifics, which is necessary to navigate a complex social environment. The fundamental mechanisms underlying face processing are starting to be well understood in a variety of primate species. However, most studies focus on a limited subset of species...

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Main Authors: Jérôme Micheletta, Jamie Whitehouse, Lisa A. Parr, Paul Marshman, Antje Engelhardt, Bridget M. Waller
Format: Article
Language:English
Published: The Royal Society 2015-01-01
Series:Royal Society Open Science
Subjects:
Online Access:https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.150109
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author Jérôme Micheletta
Jamie Whitehouse
Lisa A. Parr
Paul Marshman
Antje Engelhardt
Bridget M. Waller
author_facet Jérôme Micheletta
Jamie Whitehouse
Lisa A. Parr
Paul Marshman
Antje Engelhardt
Bridget M. Waller
author_sort Jérôme Micheletta
collection DOAJ
description Many species use facial features to identify conspecifics, which is necessary to navigate a complex social environment. The fundamental mechanisms underlying face processing are starting to be well understood in a variety of primate species. However, most studies focus on a limited subset of species tested with unfamiliar faces. As well as limiting our understanding of how widely distributed across species these skills are, this also limits our understanding of how primates process faces of individuals they know, and whether social factors (e.g. dominance and social bonds) influence how readily they recognize others. In this study, socially housed crested macaques voluntarily participated in a series of computerized matching-to-sample tasks investigating their ability to discriminate (i) unfamiliar individuals and (ii) members of their own social group. The macaques performed above chance on all tasks. Familiar faces were not easier to discriminate than unfamiliar faces. However, the subjects were better at discriminating higher ranking familiar individuals, but not unfamiliar ones. This suggests that our subjects applied their knowledge of their dominance hierarchies to the pictorial representation of their group mates. Faces of high-ranking individuals garner more social attention, and therefore might be more deeply encoded than other individuals. Our results extend the study of face recognition to a novel species, and consequently provide valuable data for future comparative studies.
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spelling doaj.art-be5b61c79b434ca08d76e11655cdb6c32022-12-21T17:59:35ZengThe Royal SocietyRoyal Society Open Science2054-57032015-01-012510.1098/rsos.150109150109Familiar and unfamiliar face recognition in crested macaques (Macaca nigra)Jérôme MichelettaJamie WhitehouseLisa A. ParrPaul MarshmanAntje EngelhardtBridget M. WallerMany species use facial features to identify conspecifics, which is necessary to navigate a complex social environment. The fundamental mechanisms underlying face processing are starting to be well understood in a variety of primate species. However, most studies focus on a limited subset of species tested with unfamiliar faces. As well as limiting our understanding of how widely distributed across species these skills are, this also limits our understanding of how primates process faces of individuals they know, and whether social factors (e.g. dominance and social bonds) influence how readily they recognize others. In this study, socially housed crested macaques voluntarily participated in a series of computerized matching-to-sample tasks investigating their ability to discriminate (i) unfamiliar individuals and (ii) members of their own social group. The macaques performed above chance on all tasks. Familiar faces were not easier to discriminate than unfamiliar faces. However, the subjects were better at discriminating higher ranking familiar individuals, but not unfamiliar ones. This suggests that our subjects applied their knowledge of their dominance hierarchies to the pictorial representation of their group mates. Faces of high-ranking individuals garner more social attention, and therefore might be more deeply encoded than other individuals. Our results extend the study of face recognition to a novel species, and consequently provide valuable data for future comparative studies.https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.150109crested macaquesdominancefamiliarityindividual recognitionmatching-to-samplesocial bond
spellingShingle Jérôme Micheletta
Jamie Whitehouse
Lisa A. Parr
Paul Marshman
Antje Engelhardt
Bridget M. Waller
Familiar and unfamiliar face recognition in crested macaques (Macaca nigra)
Royal Society Open Science
crested macaques
dominance
familiarity
individual recognition
matching-to-sample
social bond
title Familiar and unfamiliar face recognition in crested macaques (Macaca nigra)
title_full Familiar and unfamiliar face recognition in crested macaques (Macaca nigra)
title_fullStr Familiar and unfamiliar face recognition in crested macaques (Macaca nigra)
title_full_unstemmed Familiar and unfamiliar face recognition in crested macaques (Macaca nigra)
title_short Familiar and unfamiliar face recognition in crested macaques (Macaca nigra)
title_sort familiar and unfamiliar face recognition in crested macaques macaca nigra
topic crested macaques
dominance
familiarity
individual recognition
matching-to-sample
social bond
url https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.150109
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