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A qualitative impairment in face perception in Alzheimer’s disease : evidence from a reduced face inversion effect

dc.contributor.authorLavallée, Marie Maxime
dc.contributor.authorGandini, Delphine
dc.contributor.authorRouleau, Isabelle
dc.contributor.authorVallet, Guillaume
dc.contributor.authorJoannette, Maude
dc.contributor.authorKergoat, Marie-Jeanne
dc.contributor.authorBusigny, Thomas
dc.contributor.authorRossion, Bruno
dc.contributor.authorJoubert, Sven
dc.identifier.citationLavallée, Marie Maxime, Gandini, Delphine, Rouleau, Isabelle, Vallet, Guillaume T., Joannette, Maude, Kergoat, Marie-Jeanne, Busigny, Thomas, Rossion, Bruno et Joubert, Sven (2016). A qualitative impairment in face perception in Alzheimer's disease : evidence from a reduced face inversion effect. J Alzheimers Dis, 51(4),
dc.subjectAlzheimer’s diseasefr
dc.subjectface inversion effectfr
dc.subjectface recognitionfr
dc.subjectvisuoperceptual processingfr
dc.titleA qualitative impairment in face perception in Alzheimer’s disease : evidence from a reduced face inversion effectfr
dc.contributor.affiliationUniversité de Montréal. Faculté des arts et des sciences. Département de psychologiefr
UdeM.statutProfesseur(e) / Professorfr
dcterms.abstractPrevalent face recognition difficulties in Alzheimer’s disease (AD) have typically been attributed to the underlying episodic and semantic memory impairment. The aim of the current study was to determine if AD patients are also impaired at the perceptual level for faces, more specifically at extracting a visual representation of an individual face. To address this question, we investigated the matching of simultaneously presented individual faces and of other nonface familiar shapes (cars), at both upright and inverted orientation, in a group of mild AD patients and in a group of healthy older controls matched for age and education. AD patients showed a reduced inversion effect (i.e., larger performance for upright than inverted stimuli) for faces, but not for cars, both in terms of error rates and response times. While healthy participants showed a much larger decrease in performance for faces than for cars with inversion, the inversion effect did not differ significantly for faces and cars in AD. This abnormal inversion effect for faces was observed in a large subset of individual patients with AD. These results suggest that AD patients have deficits in higher-level visual processes, more specifically at perceiving individual faces, a function that relies on holistic representations specific to upright face stimuli. These deficits, combined with their memory impairment, may contribute to the difficulties in recognizing familiar people that are often reported in patients suffering from the disease and by their
dcterms.alternativeface inversion effect in Alzheimer’s diseasefr
dcterms.bibliographicCitationJournal of Alzheimer's Disease ; vol. 51, no 4
UdeM.VersionRioxxVersion acceptée / Accepted Manuscript

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