Source-monitoring & Psychosis

Inclusion Criteria: * Men and Women aged between 18 and 30 * Having given their written informed consent * French speakers and readers * Absence of hearing impairments (or tinnitus) that could prevent the successful completion of tasks involving listening to sounds or words * Absence of visual impairments that could prevent the successful completion of tasks involving reading on the screen * For the healthy control group, no history of previous diagnosed psychiatric disorders (according to the criteria of the Diagnostic and Statistical Manual of Mental Disorders - DSM5), absence of relatives diagnosed with spectrum disorder schizophrenia and bipolar disorder (DSM5), absence of psychotic prodromes measured by a score of less than 6 in the "prodromal questionnaire" - PQ-16 (Ising et al., 2012), absence of drug treatments (except oral contraception). * For the UHR group, meeting the UHR criteria according to the "Comprehensive Assessment of at-risk mental state" (CAARMS). * For the FEP group, presenting with daily psychotic symptoms for at least a week. Exclusion Criteria: * Do not consent to be included in the study * Contraindication to MRI scan * History of neurological disease * Pregnancy * Being under tutorship or curatorship * Having developed musical abilities (that is, regularly practicing a musical instrument)