Study of Electrophysiological Markers Related to the Cognitive and Affective Processes Behind Empathic Behaviour in Schizophrenic Spectrum Disorder

Study Overview
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Brief Summary
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Disorders of social cognition, and empathy more specifically, are at the heart of schizophrenic pathology in that they are strongly linked to the social handicap of patients. It is therefore necessary to refine our knowledge of the cognitive and affective processes behind this empathic disorder and to identify objective and easily measurable markers (related to brain functioning collected by electroencephalography) of these processes with the subsequent aim of improving their management. It is also relevant to question the trait/status nature of these empathic disorders by studying these markers in individuals presenting more or less marked schizotypic traits and therefore more or less at risk of developing schizophrenia. Studying the possibility that empathy disorders may be part of the factors of developmental vulnerability for schizophrenia and identifying objective markers of this vulnerability could allow, in case of development of the pathology, a more rapid diagnosis and a more effective management.

Official Title
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Study of Electrophysiological Markers Related to the Cognitive and Affective Processes Behind Empathic Behaviour in Schizophrenic Spectrum Disorder

Conditions
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Schizophrenia

Intervention / Treatment
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* Other: Evoked Related Potentials


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Common to all: good command of the French language, right-handed. Specific to patients: diagnosis of schizophrenia or schizoaffective disorder, clinical state stabilized according to the treating psychiatrist. Exclusion Criteria: Common to all: having suffered a head injury with loss of consciousness lasting more than 5 minutes, participating in another project at the time of the present study, presenting an addiction to a toxic substance (excluding tobacco), presenting a mental retardation or neurological disorder (verified by a pre-recruitment interview and the administration of the Mini International Neuropsychiatric Interview for control subjects and on the basis of the information in the medical file for patients). Patient-specific: significant change (according to the doctor) in treatment in the previous month, currently hospitalized. Specific to controls: taking a psychoactive drug, having a mental disorder, being first-degree related to a patient with a disorder other than schizophrenia or schizoaffective disorder.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: CONTROLLED SUBJECTS<br>In this arm, only controlled subjects (pathological-free) will be investigated. | Other: Evoked Related Potentials<br>* Evoked Related Potentials are measured by means of electroencephalography. During this measure, 2 informatic task will be performed to evaluated evoked related potentials.<br>|
| Experimental: PATIENTS<br>In this arm, only patients with scyzophrenic syndrome will be investigated. | Other: Evoked Related Potentials<br>* Evoked Related Potentials are measured by means of electroencephalography. During this measure, 2 informatic task will be performed to evaluated evoked related potentials.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evoked Related Potentials | Amplitude of modulations of the electrophysiological signal | On the first day |