Clinical Research Directory

Inclusion Criteria: * Adolescent aged 12 to 17 years at the time of enrolment (participants aged 17 must not have turned 18 on the day of inclusion). * Adolescent owning a smartphone, with usage \>14 hours/week and a score \>10/21 on the early overexposure screening questionnaire (e-KID). * Adolescent and parent(s) or legal guardian(s) able to understand the objectives of the research. * Adolescent whose parent(s) or legal guardian(s) have signed an electronic informed consent (e-Consent) prior to any study-related procedures. (The minor's signature will be sought but is not mandatory. In accordance with Article L1122-2, consent from one parent/legal guardian is sufficient for inclusion and data analysis; however, consent from both parents will be systematically sought.) \- Adolescent affiliated with a health insurance plan (either as the beneficiary or dependent). Exclusion Criteria: * Adolescent with severe psychiatric disorders (DSM-V diagnosis and/or treatment with amphetamines, neuroleptics, or psychotropic drugs). * Adolescent currently excluded from participation due to a previous or ongoing study. * Adolescent under legal guardianship or conservatorship (tutelle or curatelle). * Adolescent female who is pregnant or breastfeeding (self-reported). * Adolescent under judicial protection (sauvegarde de justice). * Adolescent in an emergency situation, with comprehension difficulties, or cognitive impairment. * Adolescent who does not speak or understand French. * Adolescent who opposes participation in the study.