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Early Sensitivity to Fearful Faces in 3.5 Months Infants
/aurieUkayetU’f:fURgU'aldaraU?fU5douardUHentazU’f:fxU-UOlivierUPascalisU’f:UU
’gUUnivgUHrenobleUTlpesfU/PN'fU"h?MéééUHrenoblefU"ranceU:gU'NRSfU/PN'fU"h?MéééUHrenoblefU"ranceU?gU<epartmentUofUPsychologyfUUniversityUofU"ribourgfU"ribourgfUSwitzerlandxgU"acultéUdeUpsychologieUetUdesUsciencesUdeUl’éducationfUUnivgUofUHenevafUHenevafUSwitzerland
laurie.bayet@upmf-grenoble.fr 'ontact=U
Conclusions
■UPsychometricUapproachUtoUemotionUperceptionUinUinfants■UEnhanced5detection5of5fearful5faces5and5eyes5in5infancy■UMostly5stable5developmental5trajectory■U5videnceUforUanUearlyUpulvinarhamygdalaUroute[■UNeuronalUcorrelates[
Detection advantage of faces with fearful eyes
■U/ogisticUmixedhmodelUofUdetectionUinUnoisyUtrialsU0?éUtoUMéFUsignalUstrengthS■U'ontrollingUforUtrialhtohtrialUvariationsUinUfaceUandUeyesUsignalUstrength
PsychometricScurveSmodeling
LookingSpreferenceSforStheSfaceSside
■U±ainUeffectUofU5motionU0χ²0’SU9U%g)²fUpU9Uégéé²S■UNoUinteractionUwithUTge
CustomSfaceSdetectionSparameters:SInfantSd'
■UWnteractiveUeffectUofU5motionUandU"eatureUvisibilityU0χ²0’SU9U%gx²fUpU9Uégé’’S■UNoUinteractionUwithUTge
Measuring face versus noise detection in infancy
■U'apitalizesUonUtheUstrongUpreferenceUforUfacesUinUinfancyU[’]■UTrialhlevelUpreferenceUforUtheUfaceUsideUcorrelatesUwithUpreferenceUatUearlyUUUUdetectionUpeakU0Pearson8sUrU9Uég)²fUpU7Uégéé’S
LookingSpreferenceSforStheSfaceSside
CustomSfaceSdetectionSparameters
■U'ompareUeachUlook8sUdurationUUUUwithUdistributionUofUlooksUUUUtoUfaceUandUnoise■UHeneratesUhitsfUmissesfUggg■UWfUmedian"aceU7UmedianNoisegroupUmedianUtresholdUisUusedU
/ookUdurationU0msfUloghscaledS
±ea
nUF
Ulook
s
é(
’é’(:é:(
AjitAA±issA
A"alseTlarmA
A'orrectRejectA
?? ’xM %%( :²M’ ’??%é
to pure noiseto face in noise
Introduction
Background
■UTttentionalUandUperceptualUsalienceUofUfearUfacesUinUadults■UTttentionalUsensitivityUtoUfearUemergesUatU%UmonthsUofUage■UPulvinarUrouteUpredictsUattractionUtoUfearUfacesUfromUbirth■UWhenUdoesUtheUperceptualUsensitivityUemerge[Objectives
■UWncreasedUdetectionUofUfearUfacesUinUinfants[■U<evelopmentalUshiftUforUfearUatU%Umonths[
References=U[’]UHelskovU-UqouiderU:é’éU[:]U/undqvistUetUalgU’²²MU[?]UWillenbockelUetUalgU:é’éU[x]U<akinUetUalgU:éé:U[(]URodgerUetUalgU:é’(
Methods
■USixtyhfourU?g(UmonthUoldUinfantsU0?’UgirlsSfUmeanUageU’’)Udays■USixtyhfourU%UmonthUoldUinfantsU0?’UgirlsSfUmeanUageU’²’Udays■USixtyhfourU’:UmonthUoldUinfantsU0?:UgirlsSfUmeanUageU?)%Udays
■USmilingU-UfearfulUfacesUfromU%UmalesUandU%UfemalesU[:]fUUUUgrayUscaledfUalignedU-Ucropped■U/uminancefUglobalUcontrastU-UspatialUfrequenciesUequatedU[?]U■UWeighted5mean-phase5noise5preserves5contrast5D5frequencies5[4,5]
Participants
Stimuli
"ourUconditions=UhU±alew"emalehU"earwSmile
’éUsMéFUsignal
randomUorderingUofUfacesfUsignalUlevelfUfaceUside
’éUs(éFUsignal ’éUs
?éFUsignal ’éUsxéFUsignal ’éUs
’ééFUsignal ’éUs%éFUsignal
face in noise
pure noise
SignalUstrengthU0FS?é xé (é %é Mé ’éé ?é xé (é %é Mé ’éé ?é xé (é %é Mé ’éé
±ea
nU±U
sgeg
m
hég:é
ég:égxég%égM
’’g:’gx
Infant d'
Infant c-bias
MM²Ums
FaceNoise
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Infant c-bias
M((Ums
FaceNoise Infant d'
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FaceNoise
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pure noise
%hmonthholds
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pure noise
’:hmonthholds
To face in noise
To matched
pure noise
Looking5preference5for5the5face5side
SignalUstrengthU0FS?é xé (é %é Mé ’éé ?é xé (é %é Mé ’éé ?é xé (é %é Mé ’éé
Psychometricfunction
TllUagesUcollapsed
Developmentaltrajectory
SignalUstrengthsU?éhMéF
Smile"ear
±outh5yes
"acialUemotion±ost
visiblefeature
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±ostUvisibleUfeature5yes ±outh Tll
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±ostUvisibleUfeature5yes ±outh Tll
0 Sg 0 Sg
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