Characterize the Links Between Sleep, Emotional Dysregulation and Learning in Neurodevelopmental Disorders.

Inclusion Criteria: * Subjects aged 7 to 12 * Able to receive clear, age-appropriate information and to participate fully in the study * Whose legal representative(s) are able to understand the objectives and risks of the research and to give their dated and signed informed consent. * Subjects benefiting from a social health insurance plan (beneficiary of the legal representative(s)) * With a diagnosis made prior to inclusion of Autism Spectrum Disorder (ASD) or Attention Deficit Disorder with or without Hyperactivity (ADHD) as defined by Diagnostic and Statistical Manual 5 (DSM-5). * With abbreviated intelligence quotient \> 80 measured by Wechsler Intelligence Scale for Children version IV (WISC-IV )no more than 6 months prior to research inclusion * No diagnosis of: fragile X syndrome, Rett syndrome, trisomy 21, tuberous sclerosis of Bourneville, von Recklinghausen disease, Cytomegalovirus encephalitis (CMV encephalitis), congenital rubella, phenylketonuria * No clinically significant abnormality which, in the investigator's opinion, could interfere with the implementation of the study. Exclusion Criteria: \- Current or past neurological problem(s) (e.g. stroke, epilepsy, meningitis, head trauma with loss of consciousness of more than 15 min, concussion, brain tumor, ...). tumor, ...) * Transmeridian travel (\> 2 time zones) in the month prior to study inclusion * Presence of a mood disorder (bipolar disorder or depression) according to DSM-5 criteria * Social jet-lag \> 2 hours (mid-point of sleep differential during weekends vs. weekdays) * Modification of psychotropic medication in the 2 months prior to inclusion * Use of melatonin-based dietary supplement(s)/medication(s) in the 24 hours prior to study inclusion * Use of psychostimulant(s) within 48 hours of study entry * Extreme chronotype (Morningness/Eveningness questionnaire score \< 10 or \> 42) * Cognitive-behavioral therapies (CBT) targeting sleep disorders * Participation in research involving an experimental drug which may interfere with the protocol\*. * Minor under guardianship * Subject in a period of exclusion (determined by a previous or current study) * Subject in emergency situation