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Traitement implicite de la prosodie émotionnelle et linguistique dans la schizophrénie : lien avec la reconnaissance des affects, l'anhédonie et la désorganisation.

Abstract : Schizophrenic patients are impaired in vocal affect recognition leading to great defect in their social functioning. These deficits have been demonstrated with explicit paradigms thus far: emotional prosody should be evaluated with an implicit manner in this pathology. 20 schizophrenic patients and 21 control subjects matched on age and sex ratio have been recruited. Firstly we have demonstrated impairment in explicit recognition of vocal emotions for schizophrenic patients. Then we have used a vocal emotional Stroop paradigm (conflict between emotions conveyed by the meaning of a word and by the voice with which it was pronounced) in order to measure implicit influence of emotional prosody on semantic emotional judgment. We have demonstrated a greater vocal emotional Stroop effect with error rate for schizophrenic patients. It was interpreted as a vocal emotional conflict resolution deficit. Vocal emotional Stroop effect with reaction times was positively correlated with social anhedonia for schizophrenic patients. This validated the paradoxical hypothesis of a hyper sensibility to vocal emotion in schizophrenic anhedonia. Finally we have explored implicit processing of linguistic prosody for the same participants. We used a psycho linguistic paradigm exploring lexical and prosodic segmentation strategies. We have demonstrated that schizophrenic patients were as able as control participants to perceive and use prosodic cues contained in phonological phrase boundaries to constrain lexical access. We concluded to dissociation between altered explicit recognition and preserved implicit perception of emotional and linguistic prosody in schizophrenia. Our results have refuted an entirely sensorial explanation of schizophrenic impairment in vocal affect recognition. They are in favour of a deficit in the cognitive stage of explicit judgment.
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https://tel.archives-ouvertes.fr/tel-00426882
Contributor : Paul Roux <>
Submitted on : Saturday, November 7, 2009 - 11:14:10 AM
Last modification on : Thursday, October 29, 2020 - 3:01:54 PM
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Paul Roux. Traitement implicite de la prosodie émotionnelle et linguistique dans la schizophrénie : lien avec la reconnaissance des affects, l'anhédonie et la désorganisation.. Neurosciences [q-bio.NC]. Université Paris-Diderot - Paris VII, 2009. Français. ⟨tel-00426882v2⟩

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