Executive Training and Brain in Adolescent

Inclusion Criteria: * 16-17 years old * girl or boy ; * French mother tongue; * Handedness: Right; * Schooled in a level corresponding to its age (2nd or 1st) * Informed consent signed by the (s) holder (s) of parental authority, in agreement with the teenager * Normal medical, neurological, neuroradiological examinations. * Health insurance Exclusion Criteria: * classical exclusion criteria for MRI * Has chronic use of alcohol or drugs; * Abuse or substance dependence (excluding nicotine) or a toxic over 5 years or has led to comas (overdoses) * Cognitive disorders of sudden onset that may reflect a stroke; history of head trauma with loss of consciousness for more than 1 hour, or encephalitis; * A chronic neurological disorder, psychiatric, endocrine, hepatic and infectious disorder; * Major disease history (diabetes, chronic lung disease, heart disorder, metabolic, hematologic, endocrine or immunological severe cancer); * A medication that may interfere with brain imaging measures (psychotropic drugs, hypnotics, anxiolytics, antipsychotics, anti-Parkinson, benzodiazepines, anti-inflammatory drugs, antiepileptics, antihistamines, analgesics and muscle relaxants central); * dyschromatopsia * Impossibility to submit itself to the study for geographical or psychiatric reasons; * Pregnant and lactating women; * Has pervasive developmental disorders and / or acquisitions identified by parents or legal guardian and (or) the teachers; * Cerebral palsy; * Fine motor disorder * Unaccompanied by parent (s) (s) or at least a person with parental authority during the visit to the research platform; * Tattoo on the head, neck or shoulders