Categorical perception of conspecific faces in rhesus macaques

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dc.contributor.advisorHoffman, Kari
dc.contributor.advisorSteeves, Jennifer
dc.creatorCassidy , Benjamin Nicholas
dc.date.accessioned2016-08-03T16:51:40Z
dc.date.available2016-08-03T16:51:40Z
dc.date.copyright2013-08
dc.degree.disciplinePsychology
dc.degree.levelMaster's
dc.degree.nameMA - Master of Arts
dc.description.abstractPrevious studies indicate humans perceive faces categorically, particularly when the faces are familiar. Categorical perception is traditionally defined by positive results on two psychophysical tasks: an identification and a discrimination task. Whether nonhuman primates demonstrate the same phenomenon has not yet been explored. This study bridges this gap in the literature by exploring categorical perception of familiar and unfamiliar conspecific faces in two rhesus macaques using computer-generated morph line continua similar to those used in previous face categorization studies. Evidence of both hallmarks of categorical perception was found, demonstrating that rhesus macaques perceive conspecific faces in a categorical manner. This phenomenon becomes more distinct when one, but not both, of the conspecific faces are personally familiar to the individual. Inter-trial adaptation effects cannot account for these results. This study has laid down the behavioural foundation for future exploration of the neural underpinnings of the phenomenon known as categorical perception.
dc.identifier.urihttp://hdl.handle.net/10315/31698
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subject.keywordsCategorical perception
dc.subject.keywordsConspecific faces
dc.subject.keywordsRhesus macaques
dc.subject.keywordsNeurology
dc.titleCategorical perception of conspecific faces in rhesus macaques
dc.typeElectronic Thesis or Dissertation

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