Inclusion Criteria:  Men and Women between the ages of 18 and 60 years old Major depressive episode of moderate to strong intensity, according to DSM-5 criteria, diagnosed by a Psychiatrist for subjects with depression ; GDS < 5 for healthy subjects Being fluent in French  Exclusion Criteria:  - Neurodegenerative disorder Cognitive impairments (MMSE<26) Sensory loss not sufficiently corrected, compromising the perception of oral instructions or visual or auditory stimuli Impairment of awareness or attentional abilities restricting completion of cognitive tasks lasting 40 minutes.  And for Patients with depressive episode:  Psychotic or catatonic features of current depressive episode Comorbid psychiatric disorder other than major unipolar depressive or anxiety disorders Current treatment by electroconvulsive therapy