Holistic perception of the individual face is specific and necessary: Evidence from an extensive case study of acquired prosopagnosia |
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| Authors: | Thomas Busigny Sven Joubert Olivier Felician Mathieu Ceccaldi Bruno Rossion |
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| Institution: | 1. Université Catholique de Louvain, Louvain-la-Neuve, Belgium;2. Département de Psychologie, Université de Montreal & Centre de Recherche Institut Universitaire de Gériatrie de Montréal, Canada;3. Service de Neurologie et de Neuropsychologie, AP-HM Timone, & Laboratoire Epilepsie et Cognition, INSERM U 751, Université de la Méditerranée, Marseille, France;1. Department of Psychology, City University London, London, UK;2. MRC Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology, and Neuroscience, King''s College London, University of London, London, UK;3. Division of Psychology and Language Sciences, University College London, University of London, London, UK;4. Institute of Cognitive Neuroscience, University College London, University of London, London, UK;1. Institute of Research in Psychology and Institute of Neuroscience, Université Catholique de Louvain, Louvain-la-Neuve, Belgium;2. Neuroscience and Cognitive Electrophysiology Research Lab, Hôpital Rivière-des-Prairies, Montréal, Canada;3. Département de Psychologie, Université de Montreal & Centre de Recherche Institut Universitaire de Gériatrie de Montréal, Canada;4. Université de Toulouse, UPS, Centre de Recherche Cerveau et Cognition (CNRS, Cerco), Toulouse, France;1. Department of Psychology, City, University of London, London, UK;2. School of Psychology and Clinical Language Sciences, University of Reading, Reading, UK;1. Department of Psychology, City, University of London, UK;2. Department of Psychological and Brain Sciences, Dartmouth College, USA;3. University of Massachusetts Medical School, USA;4. Department of Psychological Sciences, Birkbeck, University of London, London, UK;1. Department of Psychology, College of Human and Health Sciences, Swansea University, Swansea, UK;2. Department of Psychological Sciences, Birkbeck, University of London, UK |
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| Abstract: | We present an extensive investigation (24 experiments) of a new case of prosopagnosia following right unilateral damage, GG, with the aim of addressing two classical issues: (1) Can a visual recognition impairment truly be specific to faces? (2) What is the nature of acquired prosopagnosia? We show that GG recognizes nonface objects perfectly and quickly, even when it requires fine-grained analysis to individualize these objects. He is also capable of perceiving objects and faces as integrated wholes, as indicated by normal Navon effect, 3D-figures perception and perception of Mooney and Arcimboldo face stimuli. However, the patient could not perceive individual faces holistically, showing no inversion, composite, or whole-part advantage effects for faces. We conclude that an occipito-temporal right hemisphere lesion may lead to a specific impairment of holistic perception of individual items, a function that appears critical for normal face recognition but not for object recognition. |
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