Schizophrenia Prodromal

Establishment of a patient library for patients who have had a first psychotic episode and who have an "at risk" status for psychotic disorder (GRD, APS, BLIPS group) or a psychosis threshold during CAARMS administration. Samples are taken on inclusion, at 2 years, and if relapse or significant clinical event within 5 years of inclusion, on 250 patients for 10 years.

Participants will complete one online intervention lasting 12 weeks. Each week, they will be asked to complete a 20-30 minute session online. The intervention is targeting improved mood and positive affect in order to support increases in motivation and goal-directed behavior. Before and after the intervention, participants will be asked to complete measures to assess symptoms, mood, and behavior.

Subtle speech disorganization could be predictive of a transition to schizophrenia of ultra-high-risk patients. The aim of our longitudinal multicenter cohort study is to identify specific linguistic markers of the psychotic transition to validate a french predictive model of this transition using computerized speech analysis techniques

The goal of this observational study is to investigate the early sensory system in clinical high risk (CHR), first episode psychosis (FEP) individuals and heathly controls. The main questions it aims to answer are: * Can anomalies in visual and auditory sensory processing serve as early markers of psychosis risk? * How are these sensory anomalies related to clinical symptom severity and emotional recognition deficits? Researchers will compare CHR and PEP participants to healthy controls to see if sensory processing differences can help identify individuals at higher risk of developing psychosis. Participants will: * Complete behavioral tasks evaluating visual processing (contrast sensitivity, contour integration, facial emotion recognition, visual inference using Necker cubes) and auditory processing (tone-matching, auditory emotion recognition). A temporal perception component will also be assessed within the auditory and emotion recognition tasks, rather than as a separate task. * Undergo electrophysiological assessments of retinal function using flash stimulation to record retinal potentials (a-wave, b-wave, phNR, oscillatory potentials). * Provide demographic, clinical, and neuropsychological data during study visits. * For CHR participants, attend follow-up visits up to 6 months post initial assessments to evaluate psychotic symptom progression.