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2020-05-27 - Colloque/Présentation - poster - Français - page(s)

Gautier Anaïs, Rendon De La Cruz Aurélia , Lefebvre Laurent , Rossignol Mandy , "Source monitoring and neuropsychological deficits in schizophrenic patients with and without hallucinations" in BAPS 2020 - Belgian Association for Psychological Sciences”, UCLouvain, Louvain-la-Neuve, Belgique, 2020

  • Codes CREF : Psychopathologie (DI3513), Neuropsychologie (DI4218), Sciences cognitives (DI4290), Psychologie cognitive (DI4211)
  • Unités de recherche UMONS : Psychologie cognitive et Neuropsychologie (P325)
  • Instituts UMONS : Institut de recherche en sciences et technologies du langage (Langage), Institut des Sciences et Technologies de la Santé (Santé)

Abstract(s) :

(Anglais) Memory for source is at the core of episodic memory retrieval. Source memory has been found to be affected in schizophrenia, possibly because of a general deficit in executive functions. Among schizophrenic symptoms, hallucinations disturb source monitoring abilities, in such a way that hallucinating patients misattribute their self-generated thoughts to external sources. The present study aimed to study source monitoring in patients with and without auditory hallucinations and to examine the possible impact of neuropsychological deficits. Fifteen schizophrenic patients without auditory hallucinations (SC), 15 schizophrenic patients with auditory hallucinations (HSC) and 15 healthy participants (HC) were submitted to a source memory task (SMT). A complementary neuropsychological assessment evaluated attentional, memory and executive functioning. Schizophrenic patients also completed the Scale for the Assessment of Positive and negative symptoms (Andreasen, 1984), the Psychotic Symptom Rating Scale (Haddock et al, 1999), and the Insight Scale (Birchwood et al, 1994). Results showed no group difference in accuracy for reading and self-imaging conditions, but patients performed significantly lower to recognize stimuli that were heard or viewed. Moreover, HSC were less accurate that SC in the hearing condition. Concerning the degree of confidence, schizophrenic patients were more confident in their wrong answers than HC, without group difference for correct answers. HSC and SC did not significantly differ on the neuropsychological assessment, but their results at the SMT were positively correlated with memory and executive performances. These results suggest specific source monitoring deficits in identifying the external sources while internal sources were correctly identified.