Neurophysiological Measures of Auditory Perception and Rehabilitation in Cochlear Implanted Patients

Inclusion Criteria: * native French speaker * no medical treatment for behavior or neurological disorders * normal or corrected vision * right-handed * normal ORL examination * valid affiliation to social security * absence of participation to another study For the cochlear implanted patients: * aged from 1 to 70 * bilateral severe to profound deafness * cochlear implant * congenital deafness, pre or post lingual For the normal-hearing subjects: * Aged from 18 to 70 * Normal tonal audiometry Exclusion Criteria: * No signed consent * Treatment for depression, epilepsy, Parkinson's or Alzheimer's disease * Physical health deficiency * Mental retardation * Neurological or psychiatric disease incompatible with the testing procedure * Schooling in a foreign language * Foreign language spoken at home with both parents * Invalid social security * For the normal hearing subjects, no known hearing deficits