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The perception of emotional facial expressions in normals and in schizophrenic patients

Casati, Paola
Defense Thèse de doctorat : Univ. Genève, 2010 - FPSE 453 - 2010/04/23
Abstract The research compares the perception of facial expressions (FE) of emotions in controls and schizophrenic patients. Three studies are presented. The first and the second study use a new morphing technique to test whether Categorical Perception (CP) exists for static displays of FE. The joint analysis of an identification (first study) and a discrimination task using morphing transitions between Neuter-Happiness and Neuter-Anger expressions demonstrate the presence of CP only for Anger in controls. CP does not occur in first-episode schizophrenia patients. The third study tests the identification of the six basic emotions in dynamic conditions. The results of a recognition task of FE from video clips showing the transformation between a neutral face and an emotional face demonstrates that schizophrenia patients need more time and a more intense facial activity than controls to detect basic emotions. It also shows that patients show selective impairments in the identification of Fear and Disgust.
Keywords EmotionsFacial expressionsSchizophrenia
URN: urn:nbn:ch:unige-96202
Note Titre en français: La perception des expressions faciales des émotions chez les sujets normaux et des patients schizophrènes
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CASATI, Paola. The perception of emotional facial expressions in normals and in schizophrenic patients. Université de Genève. Thèse, 2010. doi: 10.13097/archive-ouverte/unige:9620 https://archive-ouverte.unige.ch/unige:9620

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Deposited on : 2010-07-15

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