Rapid Categorization of Human and Ape Faces in 9-Month-Old Infants Revealed by Fast Periodic Visual Stimulation

Abstract This study investigates categorization of human and ape faces in 9-month-olds using a Fast Periodic Visual Stimulation (FPVS) paradigm while measuring EEG. Categorization responses are elicited only if infants discriminate between different categories and generalize across exemplars within...

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Autores principales:	Stefanie Peykarjou, Stefanie Hoehl, Sabina Pauen, Bruno Rossion
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d688cf8120564fcabc74901a38c94118
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spelling	oai:doaj.org-article:d688cf8120564fcabc74901a38c941182021-12-02T15:05:50ZRapid Categorization of Human and Ape Faces in 9-Month-Old Infants Revealed by Fast Periodic Visual Stimulation10.1038/s41598-017-12760-22045-2322https://doaj.org/article/d688cf8120564fcabc74901a38c941182017-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-12760-2https://doaj.org/toc/2045-2322Abstract This study investigates categorization of human and ape faces in 9-month-olds using a Fast Periodic Visual Stimulation (FPVS) paradigm while measuring EEG. Categorization responses are elicited only if infants discriminate between different categories and generalize across exemplars within each category. In study 1, human or ape faces were presented as standard and deviant stimuli in upright and inverted trials. Upright ape faces presented among humans elicited strong categorization responses, whereas responses for upright human faces and for inverted ape faces were smaller. Deviant inverted human faces did not elicit categorization. Data were best explained by a model with main effects of species and orientation. However, variance of low-level image characteristics was higher for the ape than the human category. Variance was matched to replicate this finding in an independent sample (study 2). Both human and ape faces elicited categorization in upright and inverted conditions, but upright ape faces elicited the strongest responses. Again, data were best explained by a model of two main effects. These experiments demonstrate that 9-month-olds rapidly categorize faces, and unfamiliar faces presented among human faces elicit increased categorization responses. This likely reflects habituation for the familiar standard category, and stronger release for the unfamiliar category deviants.Stefanie PeykarjouStefanie HoehlSabina PauenBruno RossionNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Stefanie Peykarjou Stefanie Hoehl Sabina Pauen Bruno Rossion Rapid Categorization of Human and Ape Faces in 9-Month-Old Infants Revealed by Fast Periodic Visual Stimulation
description	Abstract This study investigates categorization of human and ape faces in 9-month-olds using a Fast Periodic Visual Stimulation (FPVS) paradigm while measuring EEG. Categorization responses are elicited only if infants discriminate between different categories and generalize across exemplars within each category. In study 1, human or ape faces were presented as standard and deviant stimuli in upright and inverted trials. Upright ape faces presented among humans elicited strong categorization responses, whereas responses for upright human faces and for inverted ape faces were smaller. Deviant inverted human faces did not elicit categorization. Data were best explained by a model with main effects of species and orientation. However, variance of low-level image characteristics was higher for the ape than the human category. Variance was matched to replicate this finding in an independent sample (study 2). Both human and ape faces elicited categorization in upright and inverted conditions, but upright ape faces elicited the strongest responses. Again, data were best explained by a model of two main effects. These experiments demonstrate that 9-month-olds rapidly categorize faces, and unfamiliar faces presented among human faces elicit increased categorization responses. This likely reflects habituation for the familiar standard category, and stronger release for the unfamiliar category deviants.
format	article
author	Stefanie Peykarjou Stefanie Hoehl Sabina Pauen Bruno Rossion
author_facet	Stefanie Peykarjou Stefanie Hoehl Sabina Pauen Bruno Rossion
author_sort	Stefanie Peykarjou
title	Rapid Categorization of Human and Ape Faces in 9-Month-Old Infants Revealed by Fast Periodic Visual Stimulation
title_short	Rapid Categorization of Human and Ape Faces in 9-Month-Old Infants Revealed by Fast Periodic Visual Stimulation
title_full	Rapid Categorization of Human and Ape Faces in 9-Month-Old Infants Revealed by Fast Periodic Visual Stimulation
title_fullStr	Rapid Categorization of Human and Ape Faces in 9-Month-Old Infants Revealed by Fast Periodic Visual Stimulation
title_full_unstemmed	Rapid Categorization of Human and Ape Faces in 9-Month-Old Infants Revealed by Fast Periodic Visual Stimulation
title_sort	rapid categorization of human and ape faces in 9-month-old infants revealed by fast periodic visual stimulation
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d688cf8120564fcabc74901a38c94118
work_keys_str_mv	AT stefaniepeykarjou rapidcategorizationofhumanandapefacesin9montholdinfantsrevealedbyfastperiodicvisualstimulation AT stefaniehoehl rapidcategorizationofhumanandapefacesin9montholdinfantsrevealedbyfastperiodicvisualstimulation AT sabinapauen rapidcategorizationofhumanandapefacesin9montholdinfantsrevealedbyfastperiodicvisualstimulation AT brunorossion rapidcategorizationofhumanandapefacesin9montholdinfantsrevealedbyfastperiodicvisualstimulation
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Rapid Categorization of Human and Ape Faces in 9-Month-Old Infants Revealed by Fast Periodic Visual Stimulation

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